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  3. It is necessary that we ______ have a good command of English at college.

It is necessary that we ______ have a good command of English at college.

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问题 It is necessary that we ______ have a good command of English at college.
选项 A、must
B、have to
C、should
D、ought to
答案C
解析 本题考查虚拟语气的用法。It is necessary/important that...“做…是必要(重要)的”，从句中用虚拟语气，其构成是should+动词原形，should可省。句意为：我们在大学时期掌握好英语是必要的。
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