On hearing the humorous story they .A. burst into cryingB. burst into laughterC. burst in

问题补充：

On hearing the humorous story, they .

A. burst into crying

B. burst into laughter

C. burst into laugh

D. burst out crying

答案：

A. burst into crying

(答案→)B. burst into laughter

C. burst into laugh

D. burst out crying

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