问题:
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
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 |
参考答案: