John’s score on the test is the highest in the class; he （） last night. ( 章节：1 难度：2)
- A、must study
- B、should have studied
- C、must have studied
- D、is sure to study
正确答案:C
答案解析:有
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John’s score on the test is the highest in the class; he （） last night. ( 章节：1 难度：2)
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