用所给动词的适当形式填空

1. Listen! The children           (sing) in the classroom.

2. We enjoy           (play) football in the aftemoon.

3.            you           (cook) when he knocked at the door?

4.He said he           (borrow) my pen the day after tomorrow.

5. He told us           (not swim) in the river.

6. I have no idea if he           (come) in five days.

7. The old man           (buy)a color TV set next week,won't he?

8. What           you            (do) at nine last night?

按照园林灯具的结构分类可以分为（）等类型。

A、开启型

B、保护式

C、密封型

D、防爆型