用动词的正确时态填空。 1. He____ (study) at this sc

问题：

用动词的正确时态填空。

1. He____ (study) at this school ten years ago.

2. They ____  (watch) TV at home since 8:00.

3. It's 9:00 now. All the students ____ (have) an English class in the classroom.

4. — ____ you ____ (see) any movie recently?

    —Yes, I ____ (see) Harry PotterⅢ yesterday.

5. Our English teacher ____ (teach) English at this school for about 20 years.

6. Mary's father likes ____ (climb) mountains, so climbing mountains is his hobby.

7. As drivers, they must ____ (obey) traffic rules.

8. She ____ (scream) when she saw a long snake.

9. We didn't go home until we finished ____ (clean) the classroom.

10. Do you know how ____  (make) a vegetable salad?