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Not until I began to work how much time I had wasted. [ ] A.didn't realize B.did

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Not until I began to work how much time I had wasted. [ ] A.didn't realize B.did

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

[]

A.didn't realize

B.did I realize

C.I didn't realize

D.I realized

试题答案

答案:B