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问题: _____the good news they began to sing ahd dance

_____the good news they began to sing ahd dance
A.at B.heard C. on D.to hear
答案选A,为什么??

解答:

at :use to show the things that caused an action or feeling.
对..../由于..... (由于一个事情,活动或是一种感觉)
例如: the children all laughted at his jokes.

由于那个好消息,他们开始唱歌跳舞.