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

Before he went abroad，hespent as much time as he _____ English.

Jane accidentally ________ where she had hidden her teacher’s birthday present, which made her classmates very annoyed.

Four years later, she became the first woman ________ a degree in agriculture from that famous school. [ ]

I’ll give her the book as soon as she_______.

______ I was surprised at ______ her positive attitude towards life after losing her legs.