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16.I missed the bus this morning,and this waswhy I was absent from the meeting.

分析 今天早上我错过了公共汽车,这就是我缺席会议的原因.

解答 why考查表语从句.分析句子成分可知,系动词was后的句子是表语从句,根据句意可知此处意为"是…的原因",故填why.

点评 表语从句属于名词性从句中的一种,也是学生们需要掌握的一种基本的英语句型,引导名词性从句的连接词选择是考试的重点,学会分析从句的句子成分是解决名词性从句的解题关键.

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