① we’ll have a meeting tomorrow has been decided. ② we’ll have a meeting tomorrow has not been decided. A. That B. If C. Whether D. what答案:AC怎样区分
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① That we’ll have a meeting tomorrow has been decided. ②Whether we’ll have a meeting tomorrow has not been decided. ① 句用that 引导主语从句，that在从句中不充当句子成分，也没有词义，但是不能省略。“我们明天要开会（这件事）已经决定了。” ②句用whether引导主语从句，whether在从句中也不充当句子成分，但是它表示“是否”，不能省略。 “我们明天是否开会（这件事）还没决定。”
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