right away 与 at once的区别

题目

right away 与 at once的区别
150.I couldn‘t make out what they were saying ,for they spoke to me____.
A.right away B.all the time C.in all D.at once
have sb to do sth,get sb to sth,make sb do sth,have sht done 请某人做谋事,have sb doing sth 让某人反复做谋事.
此题的答案是get 为什么不是have

答案

我觉得这题 应该选B 一直
根据题目意思,我不能弄明白他们在说什么,因为他们一直在说.
right away 与 at once都是马上的意思,可以不加以区分,一般选项不会同时出现.
have sb to do sth 是没有这个用法的,
应该是have sb do sth