It's a rule in my class that our classroom -- before 6.00 pm every day.

分类: 作业答案 • 2021-12-31 13:06:08

问题描述：

It's a rule in my class that our classroom -- before 6.00 pm every day.
A.be able to clean B.should be cleaning C.must clean D.must be clean

答

B.should be cleaning