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(2013·東北三校4月聯考)—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.
A．is controllingB．controls
C．has controlledD．controlled
B
B　句意：“汽車的價格在過去的20年急劇下降。”“這一點也不奇怪，因為市場規(guī)律決定產品的價格�！薄笆袌鲆�(guī)律決定產品的價格”說的是一個客觀事實，因此用一般現在時。
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