It is illegal for a public official to ask people for money ____ favors to them

A.in preference to

B.in place of

C.in agreement with

D.in exchange for

答案及解析： D

解析：

介词词组辨析题。A. in preference to 偏好B. in place of 替代 C. in agreement with 一致         D. in exchange for 交换  句意：官员以权谋私是非法的。根据语境选D