Not until I began to work how much time I had wasted.A. didn’t I realizeB. did I realize C

问题补充：

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

A. didn’t I realize

B. did I realize

C. I didn’t realize

D. I realized

答案：

A. didn’t I realize

(答案→)B. did I realize

C. I didn’t realize

D. I realized

解析：可联系答.案.网客服索取。