John’s score on the test is the highest in the class; he _____ last night.A.must studyB.should have studieDC.must have studieDD.is sure to study
John’s score on the test is the highest in the class; he _____ last night.
A.must study
B.should have studieD
C.must have studieD
D.is sure to study
B.should have studieD
C.must have studieD
D.is sure to study
参考解析
解析：本题考查情态动词
C选项，句意：约翰的考试分数全班最高;他昨天晚上一定学习了。表示对过去某一动作行为的猜测须要用must have done这一句型结构。
A，选项，对现在的猜测，与题意不符，故排除。
B，选项，本该做而未做，故排除。
D，与题意不符，故排除。
故正确答案为C选项。
C选项，句意：约翰的考试分数全班最高;他昨天晚上一定学习了。表示对过去某一动作行为的猜测须要用must have done这一句型结构。
A，选项，对现在的猜测，与题意不符，故排除。
B，选项，本该做而未做，故排除。
D，与题意不符，故排除。
故正确答案为C选项。
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