10.　 Do you know ______ shirt it is?

9.　　　 I don’t know ______ so many people crowding round him

8.　　　 I was really surprised at ______ I saw.

7.　　　 She wanted to know _______ her coat would be ready the next day.

6.　　　 They don’t know _______ we are going hiking.

5.　　　 I really don’t know ________ the bridge will be finished.(how long, how soon)

4.　　　 He always thinks ______ he can do better.(how, who)

3.　　　 She said _____ it wouldn’t matter much.(that, if)

2.　　　 Can you tell me ______ else is going to be on duty today?(who, whom)

1.　　　 Wang Hai told me _____ he didn’t go cycling yesterday afternoon.(how, why)