1 . It’s amazing! I can’t believe ________ you could make it to the top in such a short time!

A．which

B．what

C．that

D．if

2 . Do you know ________ he did not turn off the light?

A．what

B．how

C．if

D．why

3 . I don't know. Did Jack finish his homework? (改为宾语从句)
I don't know ________ Jack finished his homework.

4 . I want to know. Can they go swimming next Sunday? (合并为含有宾语从句的复合句)
I want to know ________ they can go swimming next Sunday.

5 . 用if, whether, when, 或how完成下列宾语从句
1. Can you tell me ________ we will have the meeting this afternoon?
2. I can't say ________ he will come on time or not.
3. She asked me ________ I could help her with her English.
4. I really don't know ________ you made the model ship by yourself.
5. —Do you know ________ the train leaves?
—Yes. It leaves at nine o'clock.

6 . We all believe ________ we can travel to the moon one day.

A．that

B．if

C．this

D．why

7 . Aunt Liu asked her son, “ Do you find my purse？”
Aunt Liu asked her son ________ ________ ________ ________ purse.

8 . "Is it the first boys­only school in the city?"asked a parent.(改为宾语从句)
A parent asked ________ it ________ the first boys­only school in the city.

9 . —The Dragon Boat races are so exciting, but our boat is still behind.
—Don’t worry. I’m sure ________ our team will win!

A．if

B．that

C．whether

D．why

10 . —I don’t know ________（是否）Mr White will come to the party next week.
—I think he will come if he is free.