—What do you think people can do for their aged parents?

—They_________ do anything except to be with them and be themselves.

A. don’t have to B. oughtn’t toC. mustn’t D. can’t

答案：

A 【解析】试题分析: 句意：你认为人们能为他们年老的父母做什么？除了陪老人和做他们自己，他们不必做任何事。don’t have to不必，oughtn’t to不应该，mustn’t 千万不要，can’t不能。根据except to be with them and be themselves除了陪老人和做他们自己，不必要做任别事，故选A 考点：考查情态动词

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