On hearing the news that her son had won the game, she laughter.
A. burst out
B. burst into
C. burst with
D. burst upon
网友回答
A. burst out
(答案→)B. burst into
C. burst with
D. burst upon
解析：考察固定结构。Burst into laughter=burst out laughing突然笑起来。结合句意可知B正确。句意：一听见她儿子赢得比赛的消息，她突然就笑起来了。