is surprising that the workers trapped in the mine in chile are all alive? (1)that (2)this (3)it (4)one
解题思路： 如下
解题过程：
is surprising that the workers trapped in the mine in chile are all alive?
(1)that
(2)this
(3)it
(4)one
答案为3，考查主语从句。
将疑问句还原成陈述句；It is surprising that the workers trapped in the mine in chile are all alive.智利困在煤矿中的工人全都活着这事真是令人吃惊。
主语从句句型：It is +adj,+that.......
it is +n+that........
it is +done+that.......
句型中it为形式主语，真正的主语为that从句。
It is important that we should learn English well
It is a pity that you didn't go to the party.
It is said that he has gone abroad.
同学你好，如有疑问请添加讨论，祝你学习进步。
最终答案：略
