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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 realize

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 realize

7. 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 realize

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

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