Question

I don't think she could have done such a stupid thing yesterday, _____?

A．do I

B．could she

C．did she

D．has she

Answer 1

C

考查反意疑问句。根据yesterday可知，could have done是对过去动作的推测，故用过去时；情态动词表示推测，反意疑问句不用情态动词，故答案选C。