用定从合并成一句话The foreign friend is from Canada.Our headmaster is shaking hands with him now
问题描述：
用定从合并成一句话The foreign friend is from Canada.Our headmaster is shaking hands with him now
答
Our headmaster is shaking hands with the foreign friend who is from Canada now.
改成定语从句,用 friend 做先行词,who 做关系代词