All the people were sad __the news. in on at with 该选哪一个啊,有固定的短语么

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All the people were sad __the news. in on at with 该选哪一个啊,有固定的短语么

at
at常用来表示产生某种情绪的原因.(有时翻译成“一听到/一看到...”)

at

at