题目内容
9.—Your classroom every day.
—So it is. It’s our duty to keep it clean and tidy.
A. cleans B. is cleaning
C. was cleaned D. is cleaned
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题目内容
9.—Your classroom every day.
—So it is. It’s our duty to keep it clean and tidy.
A. cleans B. is cleaning
C. was cleaned D. is cleaned