He won the scholarship. He _____ hard these terms. -题库考试答案搜索网

He won the scholarship. He _____ hard these terms.

单选题

2022-03-27 09:49

A、should have worked
B、must have worked
C、must have been working
D、could have worked

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正确答案

C

试题解析

本题考查的是情态动词表示推测的情况。must表示肯定推测，接现在时表示对现在的肯定推测；接完成时则表示对过去情况的肯定椎测。同样，接现在完成进行时，则表示对一直以来情况的推测。根据题意，是说他这些学期以来一定一直都很努力学习，所以选C。

标签：成人英语三级考试成人英语三级

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