It’s a rule in our school that the classroom _________ every day.

It’s a rule in our school that the classroom _________ every day.

题目
It’s a rule in our school that the classroom _________ every day.
A.should clean B.should be cleaned C.should cleaned D.should be cleaning
.A.should clean B.should be cleaned C.should cleaned D.should be cleaning
答案
选择B其中should可以省略,直接填be cleaned也可以.这是表示规则,命令的用法,除了用名词rule,requirement,order等,也可以用动词require等.如:We are required that the classroom (should) be clean every day.至于...
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