问题:
It was not until dark _____ he found _____ he thought was the correct way to solve the problem.
A.that; that
B.that; what
C.when; what
D.when; that
It was not until dark _____ he found _____ he thought was the correct way to solve the problem.
A.that; that | B.that; what | C.when; what | D.when; that |
参考答案: