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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