Not untilto work how much time I had wasted.A. did I begin;did I realizeB. did I begin;I r

问题补充：

Not untilto work，how much time I had wasted.

A. did I begin;did I realize

B. did I begin;I realize

C. I began;did I realize

D. I began;I realize

答案：

A. did I begin;did I realize

B. did I begin;I realize

(答案→)C. I began;did I realize

D. I began;I realize

解析：在not...until句式中，把not until（till）置于句首，主句全部倒装。