You look so tired. Why ____________ to have a rest ?
| A．not to stop | B．don't stop |
| C．not stop | D．not you stop |
--- Must I finish my homework now?
-- No, you ________. You can go home now.
| A．needn’t | B．mustn’t | C．shouldn’t | D．can’t |
Could you say it again? I can’t understand __________ you are talking about.
| A．how | B．when | C．what | D．which |
The man called his professor for help because he couldn’t solve the problem by _________.
| A．herself | B．himself | C．yourself | D．themselves |
I always tell my students _________ on the road because it’s really dangerous.
| A．not to play | B．to play not | C．not playing | D．not play |
A: I enjoyed the performance very much.
B: Yes, it was really good. I think ________ boy in white was the best actor.
A: a B: an C: theD: /