题目内容
It is required that no smoking ______ in the school.
| A.was allowed | B.be allowed |
| C.would be allowed | D.had been allowed |
B
考查虚拟语气中的(should) + v 的形式。
练习册系列答案
相关题目
题目内容
| A.was allowed | B.be allowed |
| C.would be allowed | D.had been allowed |