---Remember not ______ rubbish while climbing the mountain. It’s bad for the environment. --- I will...
2022-11-23 23:23:27 134次 2016届山东济南商河县九年级第二次中考模拟考试英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
---Remember not ______ rubbish while climbing the mountain. It’s bad for the environment.
--- I will keep that in mind.
A. drop B. dropping
C. to drop D. dropped
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