问题 选择题

The teacher_____have thought Johnson was worth it or she wouldn’t have wasted time on him,I suppose.

A.should

B.can

C.would

D.must

答案

答案:D

“must have +动词+ed形式”表示“一定做了某事”。根据所提供的情景or she wouldn’t have wasted time on him可判断出老师一定认为Johnson值得教,要不她不会在他身上浪费那么多时间。“should have +动词+ed形式”表示“本来应该做某事,而没有做”,常用于表示责备。“can have +动词+ed形式”表示“可能做了某事”。would用于表示虚拟、假设、条件等,有“要、将要、会、就会”等意思。

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