1. Look, they _______ (play) games on the playground.
2. Listen, who ________ (sing) in the next room?
3. — Why ______ (be) he very happy now? 
    — Because his mother gave him a present.
4. — Where _______ (be) you yesterday afternoon? 
    — I _______ (be) at home.
5. I _______ ( not do) my homework yesterday afternoon. I _______ (watch) TV.
6. — Who _______ (come) to see you last Sunday? 
    — My uncle _______ (do).
7. — _______ you _______ (play) football with your friends yesterday morning? 
    — Yes, I _______ (do).
8. _______ (go) and see who is in that room.
9. _______ (not play) in the street. It's dangerous.
10. _______ (be) there any ink in that bottle?

A.doesn't                                                          
B.mustn't                                                          
C.can't                                                            
D.needn't