28． He began to try every material the best way to work it out. A. known to find B. knowing to find C. knowing finding D. known finding 【查看更多】

 

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He began to try every material _________ the best way to work it out.

A. known to find                  B. knowing to find                   

 C. knowing finding                       D. known finding

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He began to try every material ________ the best way to work it out.

A. known to find                              B. knowing to find

C. knowing finding                            D. known finding

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He began to try every material ________ the best way to work it out．


  1. A.
    known to find
  2. B.
    knowing to find
  3. C.
    knowing finding
  4. D.
    known finding

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He began to try every material ________ the best way to work it out．

[　　]
A．

known to find

B．

knowing to find

C．

knowing finding

D．

known finding

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