(2013·东北三校4月联考)—Car prices have been going down sharply in the last 20 years.—It’s not surprising because the law of market ________ the price of a product
单选题
(2013·东北三校4月联考)—Car prices have been going down sharply in the last 20 years.—It’s not surprising because the law of market ________ the price of a product