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We should use the learned knowledge in our work because in no case ____ from practice.

A. should theory separate
B. should theory be separated
C. theory should be separated
D. theory should separate
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科目：高中英語 來源：模擬題 題型：單選題

We should use the learned knowledge in our work because in no case ____ from practice.

[     ]

A. should theory separate
B. should theory be separated
C. theory should be separated
D. theory should separate

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