Not until I began to work _______ how much time I had wasted.(本题2.5分) A、 didn’t I realize B、 did I realize C、 I didn’t realized D、 I realized

Not until I began to work _______ how much time I had wasted.(本题2.5分)
A、 didn’t I realize
B、 did I realize
C、 I didn’t realized
D、 I realized

出自：西安石油大学大学英语

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