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 Practicemakesperfectandweneedpractice

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問題詳情:

 Practicemakesperfectandweneedpractice

 Practice makes perfect and we need practice______ our theory.

A. which to be based on              B. on which to base   

C. which to base on                  D. to which to be based on

【回答】

B

知識點:複合句

題型:選擇題

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