问题
选择题
The teacher often tells us_____our classroom_____.[ ]
A.to keep; to clean
B.keeping; cleaning
C. to keep; clean
D.keep; clean
答案
答案：C
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The teacher often tells us_____our classroom_____.[ ]
A.to keep; to clean
B.keeping; cleaning
C. to keep; clean
D.keep; clean
答案：C