She was so amused with the magician’s tricks that she a smile.A. broke outB. burst intoC.

问题补充：

She was so amused with the magician’s tricks that she a smile.

A. broke out

B. burst into

C. burst out

D. got into

答案：

A. broke out

(答案→)B. burst into

C. burst out

D. got into

解析：考查短语辨析。A爆发；B突然…起来（后面接名词）；C突然…起来（后面接doing）;D进入；句意：她对于魔术师的小把戏如此惊讶以至于她突然笑了起来。根据句意说明B正确。