the computers we are using now are much more advanced that ______ you used years ago.应该选什么?
问题描述：
the computers we are using now are much more advanced that ______ you used years ago.应该选什么?
which
these
them
those
为什么?
答
空格线前面的that应该是than吧?
选those
which引导定语从句,前面应该有先行词,也就是说即使用了which前面也必须有those 或those computers.
these和them是指示代词,没有引导从句的功能.
those也是指示代词,但是可以引导从句,相当于those who或those which.