It wasn’t until dark he found he thought was the correct way to solve the problem.A. whe

问题补充：

It wasn’t until dark he found he thought was the correct way to solve the problem.

A. when , that

B. that , that

C. when , what

D. that , what

答案：

A. when , that

B. that , that

C. when , what

(答案→)D. that , what

解析：

试题分析:句意：直到天黑他才找出他认为正确的解决问题的方法。根据结构可知第一个空是强调句型，特点去掉it was……that 句子意思完整，通顺，排除A、C选项；第二个空是宾语从句的引导词，从句中缺少主语，that引导宾语从句不做成分，所以答案选D。