1 . 单句改错（每题只有一处错）
增加：在缺词处加一个漏字符号(∧)，并在其下面写出该加的词。
删除：把多余的词用斜线(＼)划掉。
修改：在错的词下划一横线，并在该词下面写出修改后的词。
1. The teacher commanded that he finishes his homework in time.
2. No matter that when I have to give a speech, I get extremely nervous before I start.
3. You will never gain success unless you fully dedicate your time to do the job.
4. That will be possible for the human beings to live on the moon in the near future.
5. The question is if the film is worth seeing.
6. Give me the book which cover is red.
7. Swim although he can, he can’t swim so far.
8. Threatening with the fog and haze, the passers-by are wearing masks.
9. It is reported it is over 100 years since Tsinghua University was founded.
10. The reason why he has to leave now is because his mother is ill in bed.

2 . 单句改错
1. I found myself in an entirely new world for the moment I arrived in Beijing.
2. Do you jump out of bed early, widely awake and ready to start your day?
3. I had run out printer ink, so I drove to the only store to buy some.
4. A wide range of factor can lead to exam stress for a kid.
5. The watch has gone wrong. I wish I bought a better one.
6. Despite of the bad weather, they decided to go outing this weekend.
7. Many roads are in bad conditions and accidents are frequent.
8. A lot of the small towns in the area are definitely worth visited.
9. Many people take for granted that black is a color of bad things while white always means something good．
10. Mr. Smith must not have gone to Beijing, for I saw him in the library just now.