1 . 单句改错
1. Between the two parts of the concert is a short break, where the audience can buy ice cream.
2. The reason which you failed, I suppose, was that you didn’t follow your teacher’s advice.
3. Do you know the reason for why he didn’t come here?
4. Have you found the cave in where the bear is sleeping?
5. They finally reached a farmhouse, which lived an old man and his dog.
6. The factory that I work is a large one.
7. I still remember the day which I went to Beijing.
8. This is the reason which he was late for school.
9. We often think of the days which we lived together on the island.
10. Dancing is an activity that sight matters more than hearing.

2 . 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.