语法与词汇
13.It is illegal for a public official to ask people for gifts or money______favors to them.
【正确答案】
D
【答案解析】句意：对于一个，公职官员来说要求人们送礼或送钱来与提供帮助进行交换是违法的.in preference to意为“优先于”；in place of意为“代替”；in agreement with意为“同意，与……一致”；in exchange for意为“交换”，符合题意。因此答案为D。