问题
选择题
As a middle school student, it's our duty to love our city and make it _____ all the time.[ ]
A. cleans
B. cleaning
C. to clean
D. clean
答案
答案：D
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As a middle school student, it's our duty to love our city and make it _____ all the time.[ ]
A. cleans
B. cleaning
C. to clean
D. clean
答案：D