Jim didn't tell me when he______.I'll let you know as soon as he______

问题描述:

Jim didn't tell me when he______.I'll let you know as soon as he______
A would arrive;arrives B would arrive;will arrive C arrived;arrives D arrived;will arrive
选哪个,为什么?

A
第一句是宾语从句,主句一般过去时,从句要用相应的过去时,
第二句由AS SOON AS 引导的时间状语从句,遵循‘ 主将从现’原则,主语是三单