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John ______ be could improve his exam results, but he did not have enough time to study.
John ______ be could improve his exam results, but he did not have enough time to study.
admin
2011-06-28
69
问题
John ______ be could improve his exam results, but he did not have enough time to study.
选项
A、knows how
B、knows that
C、knew how
D、knew that
答案
C
解析
考时态和连词。根据从句可判断为过去时，排除选项A和B。how表示如何，符合题意。选项C是正确的。
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英语题库成考专升本分类
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