They wanted to charge $ 5 000 for the car we managed to bring the price down .A. but B.

问题补充：

They wanted to charge $ 5, 000 for the car , we managed to bring the price down .

A. but

B. so

C. when

D. since

答案：

(答案→)A. but

B. so

C. when

D. since

解析：本句中wanted to charge $ 5,000 和we managed to bring the price down构成逻辑上的转折关系。