题目内容
4．Many people love doing sports these daysbecause they want to be healthy．分析 这些天许多人喜欢做运动，因为他们想保持健康．
解答 答案：because．句意"这些天许多人喜欢做运动，因为他们想保持健康．"根据they want to be healthy他们想保持健康，是Many people love doing sports these days这些天许多人喜欢做运动的原因，所以应该是because引导的原因状语从句，故用because．
点评 注意句子的结构，根据句意作答．
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