The audience when they heard the humorous story.A. burst into laughingB. burst out laught

问题补充：

The audience when they heard the humorous story.

A. burst into laughing

B. burst out laughter

C. burst into laughter

D. burst in laughing

答案：

A. burst into laughing

B. burst out laughter

(答案→)C. burst into laughter

D. burst in laughing

解析：考查短语搭配。表示“突然大笑起来”可以用burst into laughter或burst out laughting。句意：当听到幽默故事，观众突然大笑起来。