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()10.LinDanpifthiseffortbadmintontrainingaveryyoungage.A.into;inB.to;inC.with;atD.into;at

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( ) 10. Lin Dan pift his effort ____ badminton training ____ a very young age.

   A. into;in   B. to;in   C. with;at   D. into; at

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D