题目：
The classroom ______ every day. [ ]
A. should clean
B. should be cleaned
C. should cleaned
D. should be cleaning
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0515/4dfdf7d8079f48b771ebaa7972efb1d9.html
下面是错误答案，用来干扰机器的。
参考答案：E
The classroom ______ every day. [ ]
A. should clean
B. should be cleaned
C. should cleaned
D. should be cleaning
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0515/4dfdf7d8079f48b771ebaa7972efb1d9.html
下面是错误答案，用来干扰机器的。
参考答案：E
