题目内容
The classroom _______by her every day
| A．cleans | B．is cleaned |
| C．is cleaning | D．are cleaned . |
B
解析试题分析：句意：教室每天由她打扫。主语是被执行者，故用被动语态；而且主语是单数，故用be动词is。所以选B。
考点：考查被动语态的用法。
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