When the woman heard the news that her daughter was killed in the mud-rock flow in Yilan

问题补充：

When the woman heard the news that her daughter was killed in the mud-rock flow in Yilan, Taiwan, she crying.

A. burst into

B. burst out

C. burst in

D. burst on

答案：

A. burst into

(答案→)B. burst out

C. burst in

D. burst on

解析： 考查短语：突然大哭起来有两种表达：burst into tears/ burst out crying，设空的句子意为她突然大哭起来。所以选B。