10. He       (think) about his composition at that time.

9. This maths problem is       (easy) than that one.

8. He brushes his teeth       (two) a day.

7. The two girls stopped       (talk) when they saw Darning.

6. I fell       (sleep) when I watched the movie.

5. Boys were singing and girls       (dance) . How happy they were！

4. We have nothing       (do) tomorrow. How about going to the park?

3. The story is about a dog       (call) Lucky.

2. The driver       (drive) home when it      (rain) yesterday.

1. Lock!What       (happen) over there?