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
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
提问时间：2020-08-12
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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