问题
选择题
You must _______the room ______ eyery day.[ ]
A. keeps… clean
B. keep… cleaned
C. keep… clean
D. keep …cleaning
答案
答案：C
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You must _______the room ______ eyery day.[ ]
A. keeps… clean
B. keep… cleaned
C. keep… clean
D. keep …cleaning
答案：C