--What else must we pay attention to ____ our school clean? --We must not throw any litter onto the ...
2022-12-29 12:12:24 172次 2014-2015学年江西省中考模拟英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
--What else must we pay attention to ____ our school clean?
--We must not throw any litter onto the ground.
A. keeping B. kept C. keep D. to keep
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