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So concentrated on her experiment that she it was time to pick up her daughter.A

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So concentrated on her experiment that she it was time to pick up her daughter.A

 So concentrated ________ on her experiment that she ________ it was time to pick up her daughter.

A. she was; didn’t realize                                  B. was she; didn’t realize

C. she was; hadn’t realized                                D. was she; hadn’t realized

试题答案

B