Professor Zhang gave us a speech yesterday _____ he talked about many things we're interested inA which B in which C when D of which
问题描述：
Professor Zhang gave us a speech yesterday _____ he talked about many things we're interested in
A which B in which C when D of which
答
B
答
B 这是一个定语从句.先行词为a speech有不懂的,欢迎追问哟!