问题

It was not until dark ______ he found that it was the correct way to solve the problem. [ ]

A: that
B: what
C: which
D: when

正确答案是：

同类题型

I feel it is your husband who _______ forthe spoiled child.

Can I have your name, sir–Err… Albert Johnson, if you _______ know.

_____,heisnotyetreadytoturnprofessional. [ ]

Compwhen they go job-hunting．

_____will you stay here —Until tomorrow afternoon．