代词
问题描述：
代词
is that qinghai-tibet railway plays an important role in china's railway history the topic that you're going to come to
这句话怎么翻译 ,句首的that 什么作用 可以用 it
答
that 就是个指示代词,表示那个, 用it突不出来“那个”的含义 .