Comrade Li promised to help us and he said he would come ______.

Comrade Li promised to help us and he said he would come ______.
A、right away
B、all at once
C、all of a sudden
D、all right
【正确答案】：A
【题目解析】：right away马上；all at once突然；all of a sudden突然；all right正确句意：李同志答应帮助我们，他说他马上就来。