Is it ture_they have solved the problem of production?

题目

Is it ture_they have solved the problem of production?
WHAT
HOW
WHICH
THAT
选出正确答案并给出理由

答案

我是英语师范学校毕业的,
这句句子应该选择THAT.
先分析句子意思：
他们解决了生产的问题,这是真的吗?
其次,分析句子结构.这是一句典型的主语从句.
IT在句中作逻辑主语,真正的主语是that引导的后面的句子,也就是they have solved the problem of production.