
burst into laughter A. 闯入;突然出现 B. 爆炸;失败 C. 突然笑起来; 大声笑了出来 D. 突发;喷出
The correct answer is C. 突然笑起来; 大声笑了出来.
"Burst into laughter" means to suddenly start laughing or to laugh loudly and unexpectedly. So in Chinese, it translates to something like "突然笑起来" or "大声笑了出来."