题目

题型：不详难度：来源：

It was not until dark ______ he found ______ he thought was the correct way to solve the problem.

A．that; what

B．that; that

C．when; what

D．when; that

答案

A 

解析

试题分析：句意：直到天黑他才发现他想到的是解决问题的正确的方法。第一空填that，这是强调句，It was not until that…，第二空填what，在found后面的宾语从句中，what he thought是主语从句，主语从句中缺少主语，用what引导主语从句，选A。