Question

It was not until dark___he found____he thought was the correct way to solve the problem.

A that;whatB that;thatC when;whatD when;that答案加原因

Answer 1

A,that: It
it
not
until...that...
“直到...才”what:
what
he
thought
“他所想的”句意：直到天黑，他才发觉他刚才所想的解决问题的方法是正确的。