1、  What _________ at 11:30 yesterday?

2、  There are 20 people in the team and most of _________ are interested in playing badminton.

3、  There are five black _________ in the picture.

4、  Have you taken down everything _________ Mr. Wang said?

5、  What _________ she doing at 9 o’clock yesterday?

6、  —The light in the office is still on.

7、  Tony _________ his paper after supper.

8、  The number of people invited _________ fifty, but a number of them were absent for different reasons.

9、  He thinks _________ wonderful to see the rainbow in the wild.

10、  A talk on Chinese culture _________ next Sunday.

11、  Do you know the man _________ is sitting over there?

12、  These trousers look very good. I wonder _________.

13、  Could you make her _________ laughing?

14、  —Has your brother finished his letter yet?

15、  —Must I clean the room at once?