一、选择题（每题2分，共20分）

1. 1. What did you do yesterday?
2. 2. She is good at English.
3. 3. I have never been to Paris.
4. 4. They are playing football now.
5. 5. He will arrive tomorrow.
6. 6. This book is very interesting.
7. 7. We should protect the environment.
8. 8. My sister is taller than me.
9. 9. The teacher asked us to finish the homework.
10. 10. It's time to go to school.