单选题 It is necessary that we ______ have a good command of English at college.
  • A. must
  • B. have to
  • C. should
  • D. ought to


【正确答案】 C
【答案解析】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。