It is necessary that we______have a good command of English at college.A、mustB、

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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。句意：我们在大学时期掌握好英语是必要的。It isnecessary／important that…意为“做……是必要(重要)的”，从句部分用虚拟语气，其结构为“should+动词原形”，should可以省略。根据句子结构，本题选C。

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