—What do you think made Mary so upset?
—__________ her new bicycle.
| A．As she lost |
| B．Lost |
| C．Losing |
| D．Because of losing |
As she’s not here, I suppose she _____ home.
| A．must go | B．must have gone |
| C．might go | D．might be going |
You _____ him the news; he knew it already.
| A．needn’t tell | B．needn’t have told |
| C．mightn’t tell | D．mightn’t have told |
You _____ practise the drums while the baby is sleeping.
| A．needn’t | B．mightn’t |
| C．mustn’t | D．won’t |
The police still haven’t found her, but they’re doing all they _____.
| A．may | B．can |
| C．must | D．will |
It’s a very kind offer, but I really _____ accept it.
| A．mustn’t | B．needn’t |
| C．can’t | D．don’t |