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Mary'sscoreonthetestisthehighestinherclass;shehavestudiedveryhard.A.mayB.shouldC.mustD.oughtto
题目详情
Mary's score on the test is the highest in her class; she ________ have studied very hard.
A. may
B. should
C. must
D. ought to
A. may
B. should
C. must
D. ought to
▼优质解答
答案和解析
答案C
第一句话中“得了最高分”是“努力学习”的结果,故用must have done表示对过去情况的肯定判断.
第一句话中“得了最高分”是“努力学习”的结果,故用must have done表示对过去情况的肯定判断.
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