27.The boy was busy doing his homework, only once in a while to look out of the window. A.stopping B.to stop C.stopped D.having stopped 查看更多

 

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The boy was busy doing his homework, only    ____  once in a while to look out of the window.

   A. stopping        B. to stop            C. stopped         D. having stopped

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27. The boy was busy doing his homework, only_____once in a while to look out of the window.

   A. stopping       B. to stop            C. stopped              D. having stopped

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The boy was busy doing his homework, only _______ once in a while to look out of the window.

A.stopping        B.to stop            C.stopped          D.having stopped

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27. The boy was busy doing his homework, only_____once in a while to look out of the window.

A.stoppingB.to stopC.stoppedD.having stopped

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The boy was busy doing his homework, only     once in a while to look out of the window.

A. stopping    B. to stop     C. stopped   D. having stopped

 

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