When Jane fell off the bike，the other children__________.

When Jane fell off the bike，the other children__________.
A、were not able to help laughter
B、could not help but laughing
C、could not help laughing
D、could not help to laugh
【正确答案】：C
【题目解析】：earl’t(couldn't)help doing sth#_#是一个常用的搭配，意为“忍不住做某事”。