Question

Not until I began to work ________ realize how much time I had wasted．

[　　]

A．

didn’t I

B．

did I

C．

I didn’t

D．

I

Answer 1

答案：B
提示：

not until位于句首，主句要实行半倒装，即谓语动词的一部分要提到主语之前。