19．---He's got our tickets．
---That's good I      afraid that he       them．（　�。�
A．am； has forgottenB．was； had forgotten
C．was； forgetD．am； will forget

分析 ---他有我們的票．
---太好了，我還擔(dān)心他把它們給忘了．

解答 答案：B
根據(jù)句意可知，此處"擔(dān)心他忘了"是發(fā)生在"現(xiàn)在知道他沒忘"之前的動作，故第一空用一般過去式was；由于主句使用了一般過去式，從句應(yīng)使用相應(yīng)的過去式形式，故排除C；故選B．

點評 做本題時，首先應(yīng)根據(jù)句意判斷出動作發(fā)生的時間，從而確定出它的時態(tài)；其次應(yīng)了解一般過去時的意義及用法，以及在含有賓語從句的主從復(fù)合句中，如果主句是一般過去時，從句要用過去的相應(yīng)時態(tài)．

練習(xí)冊系列答案
相關(guān)習(xí)題

科目：高中英語 來源： 題型：選擇題

11．-Tom didn't pass the exam
-_____？He was studying hard all the time!（　　）
A．whenB．WhatC．PardonD．How

查看答案和解析>>

科目：高中英語 來源： 題型：選擇題

10．By the time Sang Lan competed in the gymnastics tournament at the New York Goodwill Games，she _____ a dedicated junior gymnast for eleven years．（　�。�
A．isB．wasC．has beenD．had been

查看答案和解析>>

科目：高中英語 來源： 題型：選擇題

7．The money collected should be made good use ______ the people who suffered a lot in the earthquake．（　�。�
A．of helpingB．to helpingC．to helpD．of to help

查看答案和解析>>

科目：高中英語 來源： 題型：選擇題

14．Not having worked out the problem，_____ leave the office．（　�。�
A．so he was not allowed toB．and he didn't want to
C．the teacher couldn't make himD．he couldn't free himself to

查看答案和解析>>

科目：高中英語 來源： 題型：選擇題

4．Shopping online can save much time as you _______ go to a shop or walk around crowded shopping centers．（　�。�
A．don't have toB．oughtn't toC．won'tD．mustn't

查看答案和解析>>

科目：高中英語 來源： 題型：選擇題

11．Quit your job after you      a new one，because it could take a long while．（　�。�
A．foundB．will findC．had foundD．have found

查看答案和解析>>

科目：高中英語 來源： 題型：填空題

8．The internet has become part of young people's life． （41 ）A report shows that 38% of students often use the Internet．Most of them get （42 ）useful （use） information on the internet （43）and use the internet to help in their studies．But many students don't use it （44）in a good way．Some play games too much，some visit websites （45）that/which they shouldn't look at．So bad things may happen （46 ）if students spend too much time on the internet．
（47 ）It is important for students to use the internet properly．Now we have a textbook，（48）which uses many examples to teach students some good ways to use the internet．It gives useful （49 ）advice （advise）．
Some students also make friends on the internet．But if you want to have a face-to-face （50 ）meeting （meet） with your online friends，let your parents know and meet in a proper place．

查看答案和解析>>

科目：高中英語 來源：2016-2017學(xué)年陜西省高一4月檢測英語試卷（解析版） 題型：閱讀理解

A healthy amount of sunshine may be the secret to staying young. British scientists have discovered.

Vitamin D is produced naturally by the skin in response to (對…的反應(yīng)) sunlight and may help to slow the ageing process and protect against heart disease, according to the study.

Researchers from King's College London studied 2,160 women aged between 18 and 79, looking at their telomeres-a biological marker of ageing found in DNA. As people get older, their telomeres get shorter and they become more susceptible (易受傷害的) to certain illnesses.

But the study found women with high levels of vitamin D had comparatively longer telomeres-a sign of being biologically younger and healthier.

The study suggests vitamin D may help to slow down the ageing process of DNA, and therefore the ageing process as a whole.

Lead researcher Dr Brent Richards said, "These results are exciting because they show for the first time that people who have higher levels of vitamin D may age more slowly than people with lower levels of vitamin D." This could help to explain how vitamin D has a protective effect on many ageing related diseases, such as heart disease and cancer."

Professor Tim Spector, a co-author of the report, added, " Although it might sound absurd(荒唐的), it's possible that the same sunshine which may increase our risk of skin cancer may also have a healthy effect on the general ageing process.

Vitamin D made by the action of sunlight on the skin accounts for 90 percent of the body's supply, but lower levels can also be got through food such as fish, eggs and breakfast cereals(粥).

Other studies have suggested the vitamin plays a key role in protecting against cancer and heart disease.

1.A certain amount of sunshine helps people stay young because _________.

A. people feel happy and energetic in the sun

B. vitamin D may help to slow the ageing process

C. sunshine protects people against heart disease

D. vitamin D makes one's skin look young and healthy

2.From Brent Richards, we know that ________.

A. sunlight causes skin cancer to people with high level of vitamin D

B. the study generally has a healthy effect on the general ageing process

C. the higher levels of vitamin D people have, the more slowly people may age

D. vitamin D can only be got from fish, eggs and breakfast cereals

3.What can we infer from the passage?

A. Sunlight does more good than harm to our health.

B. Telomeres are important as they are signs of ageing of the DNA.

C. Sunlight can be dangerous as it causes skin cancer.

D. Vitamin D can also be gained from food.

4.What is the best title of the passage?

A. Secret of Staying Young

B. Sunlight and Vitamin D

C. Vitamin D Helps Slow Ageing

D. Sunlight and Health

查看答案和解析>>

同步練習(xí)冊答案