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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

Scientists say it may be one year or so ________ it is possible to test the new medicine on human patients.

A．whenB．afterC．beforeD．since

试题答案

C

解析

标签：oryearsopossibleis

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