The classroom is very dirty .You must keep it _____.

问题描述:

The classroom is very dirty .You must keep it _____.
A.clean
B.cleaned
Ccleaning

A
教室很脏.你必须让它保持干净~
keep sth.adj.
让.保持.
不明白的再问哟,请及时采纳,多谢!