题目内容

20．Playing com puter games for a long time is veryharmful（有害的） to our health．

分析 长时间的玩电脑游戏有害我们的健康．

解答 答案harmful． 考查固定短语．根据句意：长时间的玩电脑游戏有害我们的健康．be harmful to是英语的固定短语"对…有害"．

点评 英语中的固定短语，既不能添词，也不能少词，是固定的，要求同学们在平时记忆准确，然后根据句意找出记忆中的固定搭配，做出正确的答案．

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