_____ wasn’t until he saw her that he felt happy.

_____ wasn’t until he saw her that he felt happy.
A、That
B、This
C、What
D、It
【正确答案】：D
【题目解析】：考察it was/is not until that 表示 直到……才……固定搭配；原句句意为：直到他看到她，他才感到高兴。