It is necessary that the students______more exercises to do.

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问题 It is necessary that the students______more exercises to do.

选项 A、have
B、must have
C、will have
D、can have

答案A

解析虚拟语气。虚拟语气可以用于主语从句中，常用的句型为：It+is(was)+形容词that．．．，主语从句中的谓语用(should)+V原形的表达形式。

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专业英语四级

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