英语选择题Jane,mymorningmeetingsmaylastlongerthanplanned.CouldyoucallmywifeandtellherIwon'thavehavelunchathome?Yes,sir.Ifanyonecallsyou'reout,I'lltakethemessage.A.When.B.While为什么选B?我觉得when也

Question

英语选择题
Jane,my morning meetings may last longer than planned.Could you call my wife and tell her I won't have have lunch at home?
Yes,sir.If anyone calls _____ you're out,I'll take the message.
A. When. B .While
为什么选B?我觉得when也行啊,有什么合理的解释?
谢谢

Answer 1

一般从句和主句的动作同时发生,多用while引导