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John's score on the test is the highest in the class, last night. [ ] A.he shoul

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John's score on the test is the highest in the class, last night. [ ] A.he shoul

John's score on the test is the highest in the class;________ last night.

[]

A.he should study

B.he should have studied

C.he must have studied

D.he must be studying

试题答案

答案:C

提示:

“must have+过去分词”表示对过去情况的推测,意为“(过去)一定/准……”.