1 . 单句改错
1. He prefers playing basketball to play football.
2. The mother walked such fast that her daughter couldn’t keep up with her.
3. She graduated in Beijing University.
4. The question is very difficult to answering.
5. My holiday is at end and I must go back to work tomorrow.
6. Please call the station to make sure when the train is left.
7. A number of student are planting trees on the hill.
8. As soon as he come back, I will tell you.
9. In the valleys we saw many yaks eat green grass.
10. A lot of buildings lay in ruin after the earthquake.