Question

Sorry，Cathy，I didn’t know that you were badly short of money then.But you ________ me for help.

A．must have asked

B．could have asked

C．would have asked

D．may have asked

Answer 1

B
解析　考查情态动词。说话人为自己不知道Cathy当时急需用钱而感到抱歉，认为Cathy当时本来可以向自己求助。could have done表示过去本来可以做某事，可实际上并没有做。