1 . 下面每个句子都只有一处语言错误。每处错误仅涉及一个单词的增加、删除或修改。
增加：在缺词处加一个漏字符号（^），并在其下面写出该词。
删除：把多余的词用斜线（\）划掉。
修改：在错的词下面划一横线，并在该词下面写出修改后的词。
1. He held out his hand to help her on her feet.
2. Someone grabbed him by his collar, and he thought they were going to help him up.
3. These experiments justify changed the normal method of work.
4. She made some purchase from the shopping mall.
5. The problem is due to discipline, or, more precise, the lack of discipline, in schools.
6. Man’s ability to reason sets him apart to other animals.
7. The purpose of the program is promote an open exchange of ideas and information.
8. This is just a small taste of what is in store with you in this exhibition .
9. For young people, there is a plenty of time to change bad habits.
10. It is necessary of you to memorize more words in the process of learning a language.

2 . 以下句子中每句有一处错误，每处错误仅涉及一个单词的增加、删除或修改。
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. —I feel terrible. I didn't do well in the math test.
—Don't take it too hard. You're already making progresses and will surely learn it well.
2. Rock climbing is great fun. You will get close to the nature and take adventures at the same time.
3. Most online classes let students learn at them own pace.
4. The policeman stopped him when he was driving home and accused him with speeding.
5. I know you are particular interested in Human Rights.
6. It has been a long time since we meet in China last time.
7. I remembered that the air conditions had turned off before I left the office.
8. What impresses the readers most are the author's humor and wisdom.
9. When you phoned me, I was having a meeting; how I wish I answered your call.
10. There being nobody else in the room, Jenny let out all the words hide in her heart for years.
11. They saw a penniless young man wandered on the pavement at this time yesterday.
12. Although I like writing from young, but it is not easy for me to enter this occupation.
13. He didn't make that clear when and where the meeting would be held.
14. My grandmother lived in a generation which women were looked down upon.
15. You can smoke here unless you leave a window open to let the smoke out.
16. Telling your teacher the problem with learning, theoretically, and they will help you.

3 . 单句改错
1. China has made a lot of progresses.
2. Fifty countries donated nearly $80 million for the project.
3. In 18th century, the country Scotland was joined to the UK.
4. Jan’s life has been great improved by the Internet.
5. People’s lives has been changed by online communities.
6. Get to know a little bit about British history will help you solve this puzzle.
7. They had castles building all around England.
8. He asked his fans to make videos, that he then joined together into one performance.
9. I was very afraid but I felt so alone and discouraged.
10. The camera which I bought it yesterday is digital.

4 . 单句改错
1. Seeing from the top of the tower, the mountain is like a sea of trees.
2. By a coincidence, we arrived there at the same time.
3. The bad news made the people very disappointing.
4. The ball was in possession of their opponents for most of the match.
5. Apart from a few faults, he is a faithfully friend.