We will take the conditions into careful account you have attached to this contract.-

问题补充：

--- We will take the conditions into careful account you have attached to this contract.

--- Thanks. Hope for further cooperation.

A. as

B. which

C. where

D. what

答案：

A. as

(答案→)B. which

C. where

D. what

解析：考查定语从句：句意：我们会认真考虑你们附录在合同中的条约。--谢谢，希望进一步合作。这是一个定语从句，修饰前面的conditions，定语从句中attached少宾语，所以用which，选B。