1 . 每句一处错误, 每处错误仅涉及一个单词的增加、删除或修改。
增加: 在缺词处加一个漏词符号（^）, 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: 在错的词下面画一横线, 并在该词下面写出修改后的词。
1. He kept concentrating in the same topic since he was a stubborn person.
2. I prefer writing a term paper than taking an examination
3. Another time five months ago, I happened to be upstairs at dusk when the window open.
4. India has a largest number of fluent English speakers.
5. He can’t forgive him for not seeing his mother before she died.
6. You must listen carefully and follow that teachers said.
7. It is not easy to quit smoke cigarettes.
8. Some puzzles look difficult but are actual quite simple.
9. I was frightening on my first day of classes at an American university.
10. I sat quietly on myself.

2 . 请你修改以下的每个句子，每句有1处语言错误，错误涉及一个单词的增加或修改。
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。
注意：1.每处错误及其修改均仅限一词；
1. One of the best player had been injured.
2. At about 3:00 a.m. in 28 July 1976, bright lights were seen in the sky outside the city of Tangshan.
3. Thousands of children was left without parents.
4. China is wide known for its ancient civilization.
5. Go from junior high school to senior high school is really a big challenge.
6. I am amazed to see such an bad accident.
7. Obvious, I was unhappy, but I won’t quit.
8. Tom is looking forward to meet the new exchange student.
9. The maths homework looks easily.
10. We are very proud from him.

3 . 请你修改以下的每一个句子，每句有1处语言错误，错误涉及一个单词的增加或修改。
增加:在缺词处加一个漏字符号(∧)，并在此符号下面写出该加的词。
修改:在错的词下面划一横线，并在横线下面写出修改后的词。
注意：每处错误及其修改仅限一词。
1. Halloween became a children’s festival in spite its religious origin.
2. It is a wonderful way for people around the world to sing with one voice , however, making the world a better place.
3. He was gratefully for what his parents had done for him.
4. The riddle on the lanterns were easy to work out.
5. They have been decorated the house twice since they bought it.
6. The first week was a little confused.
7. This was my first time spending three days enjoy the Naadam Festival in China’s Inner Mongolia.
8. It brings peace and beauty to me, that makes me feel like I’m lying by a stream in a forest.
9. Seen from the top of the hill, we can have a better view of the city.
10. If you tell him a secret, he will never talks about it with anybody else.
11. The actress couldn’t take part in the performance because of the injury of one of his knees.

4 . 单句改错
1. Tony is looking forward to meet the new exchange students.
2. I was totally confusing by so many questions.
3. Mary’s confidence made good impression on everyone in the speech contest.
4. He has to take the responsible for everything.
5. I was trying to quit smoke at that time.