4.________ to sunlight for too much time will do harm to one

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4.________ to sunlight for too much time will do harm to one's skin.A.Exposed B.Having exposed C.Being exposed D.After being exposed
1.________ in the queue for half an hour,Tom suddenly realized that he had left his wallet at home.A.To wait B.Have waited C.Having waited D.To have waited
原因说清楚点,我有些笨.

4 C
Being exposed to sunlight for too much time will do harm to one's skin.(动名词结构做主语)
==When you are exposed to sunlight for too much time,it will do harm to your skin.（时间状语从句）
1 Having waited in the queue for half an hour,Tom suddenly realized that he had left his wallet at home.(分词结构做时间状语)
===After he had waited in the queue for half an hour,Tom suddenly realized that he had left his wallet at home .（时间状语从句）

4.________ to sunlight for too much time will do harm to one ___ to sunlight for too much time will do harm to one's skin #[2] _____ to sunlight for too much time will do harm to one _____ to sunlight for too much time will do harm to one&apos 1、( ) to sunlight for too much time will do harm to one's sk _____ to sunlight for too much time will do harm to one's sk ____to sunlight for too much time will do harm to one's skin [-C33] ____to sunlight for too much time will do harm to one ___to sunlight for too much time will do harm to one 's skin ＿＿＿to sunlight fot too much time will do harm to one”s skin. 【非谓语选择题】（）to sunlight for too much time do harm to one's sk Being exposed to sunlight for too much time will do harm to