真题练习

805.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

806.Where is my dictionary?I remember I put it here yesterday.
You ______ it in the wrong place.

A.must put
B.should have put
C.might put
D.might have put

答案解析

805.答案是D;must have done表示对过去所做事情的肯定判断。
806.答案是D;由yesterday得知A;C两项错误。Should have put本应做而实际未做；might have put对过去的情况推测，也许有可能做过某事。