My brother is honest. He such a thing.A. might not doB. can’t have doneC. can doD. mustn’

问题补充：

My brother is honest. He such a thing.

A. might not do

B. can’t have done

C. can do

D. mustn’t have done

答案：

A. might not do

(答案→)B. can’t have done

C. can do

D. mustn’t have done

解析：考查情态代词用法。有把握的肯定推测用must,有把握的否定推测用can’t.根据句意可知是对过去发生的事情进行推测。结合句意可知是否定。句意：我的兄弟很诚实。他不可能做了这样的事情。