what was it______they werediscussing at that meeting?答案是that,为撒?
问题描述：
what was it______they werediscussing at that meeting?答案是that,为撒?
为撒不能what?
答
因为这是一个定语从句,后面的原来修饰前面的it 所指代的内容,只能用that