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

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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; beforeB．two dozens; thatC．two dozens of; beforeD．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

 

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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

 

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科目：高中英語(yǔ) 來(lái)源： 題型：單選題

About ____ gene-targeting drugs are already in testing pipeline. It won’t be long ____ they are put into effect.


  1. A.
    two dozen; before
  2. B.
    two dozens; that
  3. C.
    two dozens of; before
  4. D.
    dozens; that

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