we must keep our Earth -------

we must keep our Earth -------
A clean B cleaning C to clean D cleaned
写出理由

laputa_ma 1年前已收到2个回答举报

潇洒游鹰春芽

共回答了22个问题采纳率：95.5% 举报

1楼回答了些什么?楼主换题了?
选A
在这里的 clean 不是谓语动词 ,keep 是
这里的clean 是修饰性的词语,表示干净的 ,就不存在动名词形式/动词不定式/过去式

1年前

会相信幼苗

共回答了24个问题举报

答案是A on,具体怎么做此类题看下面： 8. in表示较长时间，如世纪、朝代、时代、年、季节、月及一般（非特指）的早、中、晚等。如 in the 81th century, in the 8981s, in 8989, in summer, in January, in the

1年前

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