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.
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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……”. |