After the actor told a funny story about his childhood all the people burst into .A. laug

问题补充：

After the actor told a funny story about his childhood, all the people burst into .

A. laugh

B. laughter

C. laughing

D. laughers

答案：

A. laugh

(答案→)B. laughter

C. laughing

D. laughers

解析：考查固定短语。固定词组burst into+名词；burst out doing sth突然…起来；句意：在那个演员讲述了一个关于童年的故事以后，所有的人都突然笑了起来。故B正确。