1 . 单句改错
1. I’ll go and get my tennis bat back before Alice went home.
2. Peter enjoys Jazz very much when his father is interested in Blues.
3. No sooner had I left my house when it began to rain.
4. All people, if they are old or young, rich or poor, have been trying their best to help those in need since the disaster.
5. The newcomer went to the library the other day and searched for no matter what he could find about Mark Twain.

2 . 单句改错
1. The book, the cover of it is broken, is not mine.
2. I know the boy to whom you have bought this book.
3. This is an unpleasant subject about what we might argue for a long while.
4. There are over 140 kinds of snakes in Australia, many of them are extremely dangerous.
5. Those foreign teachers, most of them have never been to China before, are enjoying their work here very much.
6. This is the hero for whom we are proud.
7. He lived in a big house, in front of it stood a big tall tree.
8. There are a great many students here, none of which like the film.
9. I was given three books on science, the first of whom I really enjoyed.
10. I have many friends, of which some are good at football.

3 . 单句改错
1. We will put off the picnic in the park until next week, which the weather may be better.
2. Jack suggested the sports meeting was put off till next week.
3. Ordering over a week ago, the books are expected to arrive at any time now.
4. In art criticism, you must assume the artist has a secret message hiding within the work.
5. The novel is said to have translated into many languages and sell well abroad.
6. I am writing to tell you something about the speech competition to be holding next month.
7. Comparing with her achievements, her shortcomings are, after all, only secondary.
8. There is still some doubt that the autumn sports meeting will be held on Friday in our school.
9. I have no idea that when he will come back.
10. He wrote many children’s books, nearly half of them were published in the 1990s.