in which 用法,求详解The time will come ______ man can fly to outer space freely.A.that B.when C.in which D.which
问题描述：
in which 用法,求详解
The time will come ______ man can fly to outer space freely.
A.that B.when C.in which D.which
答
这是个定语从句，先行词是time，in which修饰time.
答
应该选B.when