Question

【题目】The teacher______have thought Johnson was worth it or she wouldn't have wasted time on him,l suppose.

A. should

B. can

C. would

D. must

Answer 1

【答案】D

【解析】考查情态动词表示推测的用法。根据后面一句话 的含义“否则她就不会在他身上浪费时间”可知前一句话意 为“老师一定认为约翰逊值得她花时间”，故用must have done的形式对过去的情况进行肯定推测。