18．You should tell your fiiend that you are concernedabout him．

分析 你應(yīng)該告訴你的朋友你很擔(dān)心他．

解答 答案是concerned．考查詞組be concerned about sb．：擔(dān)心某人，為某人擔(dān)憂．句意是"你應(yīng)該告訴你的朋友你很擔(dān)心他．"故答案是concerned．

點評 本題考查首字母填空．首先要根據(jù)語境明確句意，然后再根據(jù)相關(guān)語法決定正確答案．

練習(xí)冊系列答案
相關(guān)習(xí)題

科目：高中英語 來源： 題型：閱讀理解

8．Britain's seed bank，the only one in the world aiming to collect all of the planet's wild plant species，has reached its goal of banking 10 percent by 2010．
The Millennium Seed Bank Project，run by Kew Gardens-one of the oldest botanical gardens-will officially deposit the 24，200th species on Thursday，a pink，wild banana from China．
More than 50 countries are now on board with Kew's giant task but vast places of the globe，including India and Brazil，still need to join in and donate seeds，director Paul Smith said．
The seed bank is one of the largest and most diverse in the world with more than 1.5 billion seeds．Its goal is to help protect the planet's bio-diversity during a time of climate change．
The wild banana seed is under threat of extinction（滅絕） in southwest China from agricultural development．It is a vital food source for Asian elephants and important for growing bananas for human consumption．
Stored at minus-20 degrees centigrade，so they can last for thousands of years，the seeds await the day that scientists hope never comes-when the species no longer exist in the wild．
It is a race against time，Smith said，because in the last decade alone，20 plants held in the bank have already been wiped out in the wild．He estimates that between a third and a quarter will become extinct this century．
"It is urgent and it is happening now．An area，the size of England，is cleared of primary vegetation（植被）every year．"Smith said．
Because most of the world's food and medicines come from nature，protecting wild plant species is quite important，scientists say．There are already many other seed banks safeguarding food crops，which only account for 0.6 percent of plant diversity．
For Kew's next goal-to collect a quarter of wild varieties by 2020-the botanists need 10 million pounds a year，or a further 100 million pounds on top of the 40 million they have already been granted．
56．What's the final purpose of the Britain's seed bank？C
A．To collect enough money for the project．
B．To safeguard food crops．
C．To protect wild plants from extinction．
D．To help scientists study wild plants．
57．The wild banana seed in China is in danger because ofA．
A．the expanding of farming work          
B．the climate change in this area
C．the large number of Asian elephants      
D．human's large consumption
58．We can learn from the passage thatB．
A．the seeds in the bank can be used now and then all over the world
B．India and Brazil haven't joined in the Seed Bank Project at present
C．there is only one seed bank in the world at present
D．the wild plants in places like India and China will never die out
59．What does the underlined word"it"in paragraph 7 refer to？B
A．The extinction of plant species．
B．The Millennium Seed Bank Project．
C．Britain's seed bank．
D．Kew Gardens'next goal．
60．Which of the following information isn't mentioned in the passage？C
A．The global partnership of collecting wild plant species．
B．The temperature condition of the conservative wild plant species．
C．The government's financial support for the seed bank project．
D．Scientists'concern on the extinct wild plant species．

查看答案和解析>>

科目：高中英語 來源： 題型：閱讀理解

9．Pat O'Burke was a poor Irishman with a large family，and one morning，waking up very early from cold and hunger，he decided to go shooting in a wood near his cottage．The wood belonged to Lord Northwood，a rich gentleman．Pat had no right to go there，but in it there were swarms of rabbits and flocks of birds that were good to eat，and Pat determined to take the risk．Suddenly he saw the owner，with a group of friends，coming towards him in the wood．There was a look of anger on Lord Northwood's face as he caught sight of the gun in Pat's hands．
Pat's heart sank with fear，but he saw there was no hope of escape，so he walked boldly（大膽） up to the group and said to Lord Northwood，"Good morning，sir，and what has brought you out so early this morning？"
 Lord Northwood，rather surprised，said he and his friends were taking a little exercise to get an appetite（食欲） for their breakfast．Then，looking at Pat with suspicion（懷疑），he said，"but why are you out so early in the morning？"
"Well，sir"said Pat，"I just came out to see if I could get a breakfast for my appetite．"
The whole crowd burst into laughter at Pat's ready wit，and with a smile Lord Northwood walked on，leaving Pat to try his luck with the rabbits．
24．This is a story aboutC．
A．a(chǎn) rich man who owned a big wood
B．a(chǎn) poor Irishman who lived all by himself
C．a(chǎn) clever man who tried to get something to eat  
D．a(chǎn)n Irish hunter with a large family
25．There was a look of anger on Lord Northwood's face．Why？B
A．He was not expecting Pat at this early hour．
B．He knew Pat was coming for shooting．
C．He didn't like the poor Irishman at all．
D．Pat had not told him he would come．
26．Why was Lord Northwood surprised？A
A．He had not expected such a bold question from Pat．
B．He wondered why Pat didn't run away．
C．Pat wasn't afraid of him．
D．Pat had a gun in his hands．
27．What made the whole crowd burst into laughter？C
A．Pat's funny looks．
B．Pat's interesting remarks．
C．Pat's quick and humorous response．
D．Pat's promise to leave fight away．

查看答案和解析>>

科目：高中英語 來源： 題型：閱讀理解

6．Long ago，sailors sailed to faraway places without the ability to rely on modern instruments to lead the way．Still，many were able to sail across vast，uncharted oceans and arrive at their destinations safely．Why didn't more sailors get lost at sea？What kinds of equipment did they use to find their way？
In early sailing history，few maps were available．Sailors had to rely on memory and on written guides called pilot books．Pilot books offered sailors information about how long it took to get to certain ports and instructions about getting in and out of the ports．Pilot books did not offer much information about sailing far from land．
Later，sailors used maps，charts，and information from other explorers to plan their trips．Early maps and charts offered descriptions of islands and coastlines tht helped sailors navigate．Experienced sailors learned where harbors，fresh water，supplies，and riendly people might be found．They were also able to warn others about dangers．Some of the early navigation practices and equipment used on these ships proved to be quite trustworthy．Early sailors used a tool called the astrolabe （星盤） to figure out the positions of stars and the sun to determine their location．For centuries，sailors planned their routes，sailed，and recorded their progress using the North Star as their only reference．They also used patterns of wind and waves as directional clues．Even though ocean waves may look the same to inexperienced eyes，they have different shapes related to the depth of the ocean and their closeness to land．Sailors even found a way that clouds and seabirds could help them．
The sailors of yesterday relied heavily on their observations and studies of the sea．Although their techniques were simple，they were able to achieve great things during their adventures at sea．
28．According to the text，pilot booksA．
A．a(chǎn)re maps charted by other sailors   
B．a(chǎn)re guides written by other sailors
C．offer descriptions of islands and ports  
D．offer information about sailing far away
29．We know from the text that early explorers and sailorsD．
A．established the shipping network    
B．invented many modern sailing tools
C．could locate all the ports and islands  
D．shared information and offered warnings
30．What is Paragraph 4mainly about？D
A．How early sailors found their way．
B．The importance of early navigation．
C．The difficulty of sailing far from land．
D．What arly sailors found on their journeys．
31．What's the author's attitude towards the sailors of yesterday？C
A．Objective．
B．Sympathetic．
C．Praiseworthy．
D．Regretful．

查看答案和解析>>

科目：高中英語 來源： 題型：閱讀理解

13．When 7-year-old Warren Buffett said，"I will be the richest man one day，"his friends made fun of his"daydreaming"．But ever since then the little boy has set about learning how to make money by selling drinks，delivering newspapers and buying stocks．The American had already earned 9，000 （equal to 90，000today） by the time he graduated from high school．
And this month the 78-year-old man，who earned his fortune by making a lot of sound investment in the stock（股票）market，took the place of Microsoft founder，Bill Gates，as the world's richest man．Gates'worth declined 1.5billion to 55.5billion in 33days after the recent financial storm，according to Forbes Magazine．
Buffett，the only son of a stockbroker，was ready to think outside the box to develop his business from a very early age．At 8，he went to golf courses collecting and selling the used balls．At 11when he sold soda pop door-to-door with a friend，the pair collected lids on streets to judge which flavor was the most popular．
As a paper boy during high school，Buffett delivered two competitor papers，so that even when customers canceled one of the subscriptions，he could still make a profit from the other．With his paper delivery savings，Buffett bought 162，000square meters of farmland and collected rent．Young Buffett stepped into the stock market at 11but earned only 5．The experience taught him one of the virtues in investing，patience．
After graduating from university，Buffett started his venture with stocks with his childhood earnings and money from friends．He researched the stocks and just bought those of solid companies that were undervalued and inexpensive at the time．By sticking to companies such as American Express and Coca-Cola，Buffett has become rich．
"Learning is important to Buffett's success．He is a learning machine who can spend his entire day reading．He keeps learning from books，street smarts and investigation，from both success and failure．In this way，he over-achieved his aptitude （能力）．"said Charlie Munger，his longtime business partner．
32．The passage is mainly aboutD．
A．why Buffett took the place of Bill Gates as the world's richest man
B．what effect Buffett's childhood experiences had on his success
C．what Buffett dreamt about when he was a child
D．how Buffett earned his fortune and achieved his aptitude
33．Which of the following is true about Buffett？C
A．He is next to Bill Gates in wealth at the present time．
B He achieved great success on stepping into the stock market．
C．His worth is more than 55.5billion now．
D He bought 162，000square meters of farmland by selling soda pop．
34．Which is the main factor that determines Buffett's success？B
A．His degree of education．
B．His eagerness to absorb the knowledge．
C．His family background．
D．His cooperation with his partner．
35．What can we infer from the passage？D
A．Buffett is an immediate success in the stock market．
B．Buffett and Gates are business partners．
C．His father helped him a lot in his business．
D．Buffett has a good sense of business．

查看答案和解析>>

科目：高中英語 來源： 題型：閱讀理解

3．Today，home-ownership has reached extremely high levels．Modern generations tend to believe there is something wrong with them if they rent．However，is high home-ownership really as people imagine？Staring at data first，we realize that the most successful，stable，attractive country in the Western world is Switzerland．It has tiny unemployment； wealth； high happiness and mental-health scores．Does it have high home-ownership rates？Absolutely not．In Switzerland，about seven in ten of the population are renters．Yet，with Europe's lowest home-ownership rate，the nation thrives．Now go to the other end of the misery distribution．Spain has approximately the highest home-ownership rate in Europe （at more than 80%）．But one-quarter of its population are unemployed．
A likely reason is that high levels of home-ownership mess up the labour market．In a sensibly functioning economy it is easy for people to move around to drop into the vibrant job slots thrown up by technological change．With a high degree of owner-occupation，everything slows．Folk get stuck．Renters can go to new jobs．In that way they do the economy a favours．As Friedman said，the rate of unemployment depends on the flexibility of the housing market．
Next we come to economic breakdown．Most analysts accept that at heart it was the housing market-obsessive pursuit of homes，the engendered mortgage（房貸） lending and an unavoidable house-price crash-that sank the Western world．Germany，say，with its more efficient rental market，had a far smoother ride through trouble．
As for the monetary system，in the past few decades，in the hope of getting untaxed capital gains way above their true labour earnings，many people threw their spare cash into buying larger houses or building extra bedrooms．TV programmes about how to make easy money，beautiful rising house prices，and most importantly，our faulty tax system encouraged that．When at some point market broke down，everyone suffered．Our countries ought，instead，to design tax systems that encourage people to invest in productive real activities and in innovation．Renting leaves money free for better purposes．
That also points to the role of sensible budgeting over a person's lifetime．Why should we think that when we die it is necessary to have paid off an entire house？Our children do not deserve it．Let them pay for themselves．We should rent-and enjoy our lives with the money saved．
Finally，moderation usually pays off．Our scientific understanding of how economies function is horribly limited．This suggests that the golden rule should be to avoid extremes．A50-50mix of home-ownership and renting，not the 70-30split that is now observed in so many Western nations，makes sense．

74．The cases of Switzerland and Spain prove thatD
A．low home-ownership rate at about 30% is most favourable for economy
B．home-ownership mainly decides a country's citizens'mental health
C．home-ownership has a lot to do with a country's technological development
D．low home-ownership increases the mobility of job market and economy
75．The main reason to make people invest in housing market isA
A．the problematic taxing approach favouring house buying
B．people's desire to avoid their money from devaluing
C．easy channels to obtain methods to make easy money
D．people's wishes to live in large and more comfortable houses
76．Which of the following statements is TRUE according to the passageB？
A．Switzerland suffers the worse unemployment in Europe
B．Renting allows more money into more creative economic activites
C．Germany's effective mortgage system saw it through the western economic crisis
D．Our children have the right to enjoy the housing property we have paid off
77．What opinion does the author agree with mostC？
A．People should learn the workings of housing market
B．Laws should be set up to stop people from buying houses
C．An adequate rate of home-ownership should be kept
D．People should follow the good example of Europe in housing investment．

查看答案和解析>>

科目：高中英語 來源： 題型：填空題

10．We all hope to live in a clean and beautiful world．Unfortunately，we produce waste every day，（61）which does harm to our environment．Still，we can all do something to help．In fact，even the simplest everyday activities can make a real （62）difference （differ） to the environment．Here are some ideas for you．
Don't waste things．This saves money and reduces waste （63）going（go） into the environment．Before we buy something new，think （64）whether/if it is really necessary-or maybe the old one will be just as good!
Use things（65）foras long as possible．When we buy things，make sure that they last a long time．We should repair them if things no longer function well instead of throwing them away and buying new （66）ones．Don't use a paper cup or a paper bag．（67）It is better to use a china cup and a lunch box because you can use them again．We'd better buy products （68）made （make） from recycled materials，such as recycled paper，to help save trees．
It is high time we（69）took/should take （take） action now!If everyone makes a contribution to protecting the environment，there will be（70）less（little） pollution and the world will become cleaner and more beautiful．

查看答案和解析>>

科目：高中英語 來源： 題型：完形填空

7．Yesterday，I cut hundreds of tomatoes for a free dinner that took place tonight in a party．As I left my home to（36）Bthe party，something came into my mind．I did not feel right leaving only with the （37）A of receiving things．I had a strong （38）Cto continue giving something to those who needed it，（39）BI had worked many hours to prepare the food．
（40）D，I decided to make a gift out of some leftover food I had cooked．I （41）Ba container with the food．Along with a（42）C，I put it in a bag，creating a packed meal．
As I was（43）Bon the street，I kept a watchful eye out for someone who was really （44）C．On my way home，I saw a （45）D man pushing a grocery cart（手推車） full of old things abandoned by others．He wandered aimlessly around the street．This cart （46）Ato be his only home and he really needed any（47）Bhe could get．I（48）Ahim that I had some food that I planned to give to someone who was hungry and I（49）D it to him．He immediately（50）Ait．After a brief conversation，the（51）Cman sincerely thanked me for what I had done．
As I walked away，a（52）Dwalking alone in the street said，"That is so kind of you!"I was really（53）Abecause I was in the area where people have a bad（54）Cand generally do not make friendly statements like that．I smiled at the passer-by and felt（55）D，as if a task had been accomplished．I wonder，though，if this really was a task，who uploaded the order into my mind？

36．A．chargeB．a(chǎn)ttendC．serveD．host
37．A．a(chǎn)imB．dreamC．needD．task
38．A．willB．a(chǎn)ttractionC．desireD．a(chǎn)mbition
39．A．becauseB．thoughC．soD．but
40．A．SomehowB．BesidesC．HoweverD．Therefore
41．A．replacedB．filledC．enlargedD．exchanged
42．A．cupB．boxC．forkD．bottle
43．A．thinkingB．walkingC．drivingD．running
44．A．oldB．thirstyC．hungryD．cold
45．A．tallB．sickC．kind-heartedD．poorly-dressed
46．A．seemedB．provedC．usedD．happened
47．A．restB．foodC．houseD．job
48．A．toldB．warnedC．remindedD．taught
49．A．movedB．mailedC．threwD．showed
50．A．a(chǎn)cceptedB．refusedC．caughtD．emptied
51．A．politeB．luckyC．homelessD．cautious
52．A．kidB．friendC．colleagueD．stranger
53．A．surprisedB．satisfiedC．excitedD．touched
54．A．environmentB．economyC．nameD．habit
55．A．safeB．inspiredC．warmD．relaxed

查看答案和解析>>

科目：高中英語 來源： 題型：閱讀理解

8．When you think about math，you probably don't think about breaking the law，solving mysteries or finding criminals．But a mathematician in Maryland does，and he has come up with mathematical tools to help police find criminals．
People who solve crimes look for patterns that might reveal （揭示） the identity of the criminal．It's long been believed，for example，that criminals will break the law closer to where they live，simply because it's easier to get around in their own neighborhood．If police see a pattern of robberies in a certain area，they may look for a suspect who lives near the crime scenes．So，the farther away from the area a crime takes place，the less likely it is that the same criminal did it．
But Mike O'Leary，a mathematician at Towson University in Maryland，says that this kind of approach may be too simple．He says that police may get better clues to the location of a criminal's home base by combining these patterns with a city's layout （布局） and historical crime records．
The records of past crimes contain geographical information and can reveal easy targets-that is，the kind of stores that might be less difficult to rob．Because these stores are along roads，the locations of past crimes contain information about where major streets and intersections are．O'Leary is writing a new computer program that will quickly provide this kind of information for a given city．His program also includes information about the people who live in the city，and information about how a criminal's patterns change with age．It's been shown，for example，that the younger the criminal，the closer to home the crime．
Other computer programmers have worked on similar software，but O'Leary's uses more math．The mathematician plans to make his computer program available，free of charge，to police departments around the country．
The program is just one way to use math to fight crime．O'Leary says that criminology-the study of crime and criminals-contains a lot of good math problems．"I feel like I'm in a gold mine and   I'm the only one who knows what gold looks like，"he says．"It's a lot of fun．"

61．To find criminals，police usuallyD．
A．check who are on the crime scene
B．seek help from local people
C．depend on new mathematical tools
D．focus on where crimes take place
62．O'Leary is writing a computer program thatC．
A．uses math to increase the speed of calculation
B．tells the identity of a criminal in a certain area
C．provides the crime records of a given city
D．shows changes in criminals'patterns
63．By"I'm the only one who knows what gold looks like"，O'Leary means that heC．
A．is better at finding gold than others
B．is the only one who uses math to make money
C．knows best how to use math to help solve crimes
D．has more knowledge of gold than other mathematicians
64．What do you know about O'Leary according to the passage？B
A．He is a man full of impractical imagination．
B．He is a man full of self-confidence．
C．He is a man who is talkative but lazy．
D．He is a man who doesn't like mathematics．
65．What is the main idea of the text？A
A．Math could help police find criminals．
B．Criminals live near where crimes occur．
C．Crime records could be used to fight crime．
D．Computer software works in preventing crimes．

查看答案和解析>>

同步練習(xí)冊答案