(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.
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A
is controlling
B
controls
C
has controlled
D
controlled
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The robber would ____ to 7 years in _____ prison.
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A
sentence; /
B
be sentenced; /
C
be sentenced; the
D
sentence ; the
Mr Smith suggested the problem worth paying attention to ________ at the meeting. 
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A
should discuss
B
was discussed
C
being discussed
D
be discussed