—What do you think we can do for our aged parents?—Youdo anything except to be with them a

问题补充：

—What do you think we can do for our aged parents?

—Youdo anything except to be with them and be yourself.

A. don’t have to

B. oughtn’t to

C. mustn’t

D. can’t

答案：

(答案→)A. don’t have to

B. oughtn’t to

C. mustn’t

D. can’t

解析：don’t have to意为“不必”。根据所提供的情景“except to be with them and be yourself”可判断出除了和他们在一起表现好不必做其他任何事。oughtn’t to 意为“不应该”；mustn’t 意为“不准,禁止”；can’t 意为“不能够,不可能”。