【题目】______the air clean, we can plant more trees. ( )
A.KeepsB.KeepC.KeepingD.To keep
【答案】D
【解析】
_____空气清洁，我们可以种植更多的树。根据语境，应该是为了保持空气清洁，此处考察to do不定式表示目的的用法，故选D。
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the air clean, we can plant more trees. ( )A.KeepsB.KeepC.KeepingD.To keep
编辑：chaxungu时间：2026-04-28 11:53:31分类：小学英语题库
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