单项选择题

Most doctors agree that overeating is one of the main health problems, since it places a great ______ on the heart.

A．strain
B．stress
C．strength
D．stroke
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单项选择题
Many scholars believed that this period was not the ______ of the Romantic literature but mere the beginning.
A．maximum
B．pitch
C．climax
D．summit
单项选择题
Mr. Johnson couldn't shake the ______ that these wounded soldiers were in deep trouble and it was up to him to help them.
A．convention
B．conservation
C．conviction
D．conversion
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