___theory must be closely connected with practice is a basic rule we should always keep in mind

题目

___theory must be closely connected with practice is a basic rule we should always keep in mind
A.Why B.What C.That D.what

答案

C句子意思：理论必须紧密和实践结合起来是一个我们应该永远记住的基本原则.可以把句子结构调整为：A basic rule we should always keep in mind is that theory must be closely connected with practice.that 在这...