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Scientists say it may be one year or so it is possible to test the new medicine

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Scientists say it may be one year or so it is possible to test the new medicine

Scientistssay it may be one year or so ________ it is possible to test the new medicineon human patients.

  A. when              B.after                C.before          D. since

 

试题答案

【答案】

C

【解析】略

 

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