Question

Mike ________ to school in time for the visiting professor's

Answer 1

答案A

这句句子的意思是“迈克本来有可能准时到学校听客座教授的讲座,但是他没有赶上校车.”言下之意,如果赶上校车的话,就能准时到校.could have done就表示“本来可能做而事实上没有做的事”.因此,本句句子就相当于“If Mike hadn't missed the school bus,he could have come to school in time for the visiting professor's lecture．”"