It is our duty _________our hometown clean and beautiful. We must do something for it. A. to keep B....
2023-02-25 06:11:54 33次 2011年贵州省贵阳市中考英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
It is our duty _________our
hometown clean and beautiful. We must do something for it.
A. to
keep B. keeps
C. keeping
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