It is required that no smoking in the school.A. was allowedB. be allowedC. would be allow

发布时间：2020-08-17 13:33:16

It is required that no smoking      in the school.
A. was allowed
B. be allowed
C. would be allowed
D. had been allowed

网友回答

A. was allowed
(答案→)B. be allowed
C. would be allowed
D. had been allowed
解析：考查虚拟语气中的(should) + v 的形式。
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