We must always keep our classroom . A. cleaning B. to clean C. clean D. cleaned——青夏教育精英家教网——

题目内容

We must always keep our classroom _____.

A. cleaning
B. to clean
C. clean
D. cleaned

试题答案

C

相关题目

We must always keep our classroom _____.

A. cleaning
B. to clean
C. clean
D. cleaned

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