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—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
A.is controllingB.controlsC.has controlledD.controlled
B

试题分析:考查时态。在英语中客观真理都使用一般现在时来表示,句意:—在过去的20年里汽车的价格下降了很多。—这不奇怪,因为市场规律能够控制一个产品的价格。故B正确。
点评:时态题的考查关键是抓住句子的上下文含义和句中的时间状语。要根据时间状语来选择合适的时态,在平时的学习中要注意积累有关时态的用法和各种时态的特殊之处。本题表示的就是客观规律用一般现在时来表达。
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