To everyone’s surprise, Michael claimed all his homework in just one hour.
A. having finished
B. to have finished
C. that finished
D. finishing
网友回答
A. having finished
(答案→)B. to have finished
C. that finished
D. finishing
解析：考查不定式的完成时态。句意：令每个人大感意外的是，米歇尔声称他仅仅在一个小时内就完成了他的所有作业。Claim后接不定式表示宣称做某事，不能接现在分词。根据句意可知，他完成作业这个动作发生在谓语动词claim之前，不定式的完成时态表示的是这个动作发生在谓语动作之前。故选B。