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【题目】Your eyesight may become poorer ________ you still spend much time on computer games.

A.unlessB.thoughC.whileD.if

【答案】D

【解析】

句意:如果你仍然花费太多的时间在电脑游戏上,你的视力可能会变得更差。

考查从属连词辨析。unless除非;though尽管;while在……期间;if如果。结合空前后句意可知此句是条件状语从句,用if引导,表示如果。故选D

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