12．It was 1969 ___________the American astronauts succeeded in landing on the moon．（　　）
A．thatB．whenC．on whichD．which

分析 在1969年美國宇航員成功登陸月球．

解答 答案：B．根據(jù)句意：在1969年美國宇航員成功登陸月球，可知此處缺少了一個引導時間狀語從句的連接詞，故B正確，如果在1969前加上介詞in可以選A，此時是強調(diào)句．

點評 本題考查時間狀語從句的連接詞，在充分分析句型再結(jié)合語義的基礎上便能選出正確答案，同時要注意其他選項的意思，

練習冊系列答案
相關習題

科目：高中英語 來源： 題型：閱讀理解

2．The extraordinary Eastgate Building in Harare，Zimbabwe's capital city，is said to be the only one in the world to use the same cooling and heating principles as the termite mound （白蟻堆）．
Architect Mick Pearce used precisely the same strategy when designing the Eastgate Building，which has no air-conditioning and almost no heating．The building-the country's largest commercial and shopping complex-uses less than 10% of the energy of a conventional building of its size．The Eastgate's owners saved 3.5millionona36 million building because an air-conditioning plant didn't have to be imported．
The complex is actually two buildings linked by bridges across a shady，glass-roofed atrium （天井） open to the air．Fans suck fresh air in from the atrium，blow it upstairs through hollow spaces under the floors and from there into each office through baseboard vents （通風口）．As it rises and warms，it is drawn out via ceiling vents and finally exists through forty-eight brick chimneys．
During summer's cool nights，big fans blow air through the building seven times an hour to cool the empty floors．By day，smaller fans blow two changes of air an hour through the building，to circulate the air which has been in contact with the cool floors．For winter days，there are small heaters in the vents．
This is all possible only because Harare is 1600 feet above sea level，has cloudless skies，little dampness and rapid temperature swings-days as warm as 31℃commonly drop to 14℃at night．"You couldn't do this in New York，with its fantastically hot summers and fantastically cold winters，"Pearce said．
The engineering firm of Ove Arup & Partners monitors daily temperatures．It is found that the temperature of the building has generally stayed between 23℃and 25℃，with the exception of the annual hot period just before the summer rains in October and three days in November，when a doorkeeper accidentally switched off the fans at night．And the air is fresh-far more so than in air-conditioned buildings，where up to 30% of the air is recycled．
47．Why was Eastgate cheaper to be built than a conventional building？B
A．It was designed in a smaller size．
B．No air conditioners were fixed in．
C．Its heating system was less advanced．
D．It used rather different building materials．
48．What does the underlined"it"in Paragraph 3 refer to？A
A．Fresh air from outside．B．Heat in the building．
C．Hollow space．D．Baseboard vent．
49．Why wouldn't a building like Eastgate work efficiently in New York？D
A．New York has less clear skies as Harare．
B．Its dampness affects the circulation of air．
C．New York covers a larger area than Harare．
D．Its temperature changes seasonally rather than daily．
50．The data in the last paragraph suggests Eastgate's temperature control systemB
A．a(chǎn)llows a wide range of temperatures
B．functions well for most of the year
C．can recycle up to 30% of the air
D．works better in hot seasons．

查看答案和解析>>

科目：高中英語 來源： 題型：選擇題

3．Who does that shop assistant think he is？He behaves _______ he owned the store．（　�。�
A．even ifB．as ifC．as long asD．if

查看答案和解析>>

科目：高中英語 來源： 題型：選擇題

20．Though Guangzhou Evergrande（廣州恒大） is the first Chinese club competing at the Club World Cup，nobody knows exactly how many years it will be __________ the Chinese football team enters the final stage of the World Cup．（　　）
A．whenB．sinceC．beforeD．until

查看答案和解析>>

科目：高中英語 來源： 題型：選擇題

7．It took more than twenty years for the great artist        the painting was finished completely．（　�。�
A．asB．beforeC．afterD．when

查看答案和解析>>

科目：高中英語 來源： 題型：選擇題

17．In the questionnaire，the subjects are questioned whether they        no smoking in the public area．（　�。�
A．revealB．advocateC．swearD．tolerate

查看答案和解析>>

科目：高中英語 來源： 題型：選擇題

4．The Chinese people make    a rule to spend the Spring Festival together with   all family members．（　�。�
A．thisB．thatC．oneD．it

查看答案和解析>>

科目：高中英語 來源： 題型：短文改錯

1．改錯題 
Although the Internet is getting more and more popular，but books are still of great important to people．That's how I love reading books very much．First，books can not only make me learn more know ledges，but also open my mind．Under the help of books，I have solved many difficult problems and get out of trouble．What's more，when I feel sad，I can make me happy by reading some interested books．All in all，I have learned a lot from reading books，which make me  a better person．In my opinion，books are best gifts from God．

查看答案和解析>>

科目：高中英語 來源： 題型：選擇題

2．I'm working this evening because I am         schedule with my work．（　�。�
A．behindB．beyondC．overD．on

查看答案和解析>>

同步練習冊答案