问题
选择题
It’s going to be some time _____ he sees his father again, _____ business has just been started in Switzerland．
A．after; who
B．before; whose
C．when; whose
D．since; who
答案
答案：B
考查before的用法及定语从句。句意：再过一段时间他才能再次看见他的父亲。他父亲的商业刚在Switzerland开办。Before在这里是才的意思， whose在这做定语。故选B。