Tom was the first boy---- left the room.A that B.who选哪个
问题描述：
Tom was the first boy---- left the room.A that B.who选哪个
答
选A
答
a
答
A that
the first 特指,只能用that
类似的还有 Tom was the one that left the room
答
B who 做定语从句的主语