While I _____________, someone ___________at the door.
| A．did my homework; knocked |
| B．do my homework; knocks |
| C．was doing my homework; knocked |
| D．was doing my homework; knocks |
---Where is Zhang Ming?
---Oh, don’t you know heto Beijing to see his parents and he’ll be back tomorrow.
A. has gone B. has been C. had gone
-- It’s very hot outside. ---Why you stay at home?
A. not B. not to C. don’t
--What are you going to do this afternoon?
--We are going to have a football match if it__
A. will rain B. rained C. doesn’t rain
---Must I finish my homework at school?
---?You can do it at home and hand it in next week.
A. Yes, you must B. No, you needn’t C. Yes, I can
--Who helped you clean the classroom yesterday?
-- . I cleaned it all by myself.
A. Somebody B. Nobody C. Everybody