Sorry,I really don't know______

问题描述:

Sorry,I really don't know______
A.When your parents and brother will come back
B.When your parents and brother would come back
答案给的是B,但是我选择的是A.本人英语专八,依然解决不了这个问题,希望绝对高手给与绝对肯定有把握的回答.

选择B ,A多在口语中.B有虚拟 也表猜测很重(实在不知道什么时候回来),结合主句看B的感情更浓,选A感情语气过于平淡(似乎知道妈妈哥哥要回来),B(实在不知道什么时候,一点概念也没有)