About _______ gene-targeting drugs are already in testing pipeline. It won’t be long ______ they are put into effect.
A.two dozen; before | B.two dozens; that |
C.two dozens of; before | D.dozens; that |
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About _______ gene-targeting drugs are already in testing pipeline. It won’t be long ______ they are put into effect.
A.two dozen; before | B.two dozens; that |
C.two dozens of; before | D.dozens; that |