( ) They can buy the pens a very good . A. at, price B. in, price C. at, cost D. at, selling 查看更多

 

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 They can buy the pens _____ a very good _____.

A. at, price   B. in, price    C. at, cost     D. at, selling

 

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They can buy the pens _____ a very good _____.

[     ]

A. at, price
B. in, price
C. at, cost
D. at, selling

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