作业帮the windows of or classroom___every daya:is cleaned b;are cleaned c:are cleaning d:is cleaning
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the windows of or classroom___every daya:is cleaned b;are cleaned c:are cleaning d:is cleaning
the windows of or classroom___every day
a:is cleaned b;are cleaned c:are cleaning d:is cleaning
the windows of or classroom___every daya:is cleaned b;are cleaned c:are cleaning d:is cleaning
选择B
首先这里主语是windows是个复数,那么排除了A和D
另外窗户是被打扫,是个被动,所以排除主动的C
所以,选择B