—What do you think we can do for our aged parents?
—You ____ do anything except to be with them and be yourself.
| A．don’t have to | B．oughtn’t to |
| C．mustn’t | D．can’t |
31. How to solve the problem __________ in the meeting right now
| A．was being discussed | B．are being discussed |
| C．is being discussed | D．is going to discuss |
30. He’s making_____great progress in his lessons that everyone else in his class can’t believe it.
| A．So | B．very | C．such a | D．Such |
29. When I met him last year in Beijing, he was busy ___________ a new job.
| A．watching over | B．suffering from | C．hunting for | D．looking after |
28. You have done wrong to Jack, _____you should say sorry to him.
| A．to which | B．for which | C．in which | D．on which |
27. That’s the woman one of __________ daughters works as an engineer in the US.
| A．who | B．whom | C．her | D．Whose |