January 5th, 2010 | 
Author: Brushing your teeth regularly, no matter which toothpaste you use, will reduce your chances of tooth decay. Scientists have concluded that, when you brush, you reduce tooth decay by removing the film of plaque that forms on teeth and gums. So, you can forget about fluorides: brush your teeth carefully and say goodbye to cavities.
Which one of the following is a criticism of the reasoning in the argument?
(A) Brushing with fluoride toothpaste has been shown to reduce tooth decay.
(B) The fact that brushing will reduce tooth decay does not show that fluorides are of no value.
(C) Few people adequately remove plaque by brushing.
(D) People have plaque on their teeth most of the time.
(E) Scientists have been wrong about fluorides.
Highlight to see answer: B
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Most energy analysts now agree that the costs of building and maintaining nuclear reactors are too high for nuclear power to likely prove cheaper than coal or oil in the long run.
(A) too high for nuclear power to likely
(B) high enough for nuclear power to be unlikely to
(C) high enough that it is unlikely nuclear power will
(D) so high that nuclear power is unlikely to
(E) so high as to be unlikely that nuclear power will
Highlight to see answer: D
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