动词填空。

1. My uncle with my grandparents ________ (live) in Beijing.

2. Is it time for us ________ (begin) our class?

3. We have fun ________ (swim) in the pool every summer.

4. Mary is clever and can ________ (speak) four languages.

5. I spend about half an hour ________ (chat) with my friends on the Internet.

6. ---Tom, __________(wash) the dishes after supper. 

   ---OK, Mum.

7. Your new friend __________ (sound) good. I want to make friends with him.

8. This pair of shoes________(not be) for Millie. They are for Sandy.

9. Everyone in Mr Wu's class ________ (not do) homework at school.

10. ________ his Chinese and English teachers ________ (come) from the same city?

穿戴防寒服等个人防护用品是防止（）作业的有效手段。

A.高温

B.低温冷水

C.矿山排水

D.危险化学品