问题
选择题
Growing up ________ Michael Jordan was in his prime，Beijing native Wu You knew what he wanted to do.
A．since
B．when
C．until
D．before
答案
答案：B
考查时间状语从句。语意：因为成长在迈克尔·乔丹盛年时期，北京人吴悠知道自己想要做什么。when在此表示“……的时候”，故选B。