单项选择题

It seems that physical activities inevitably ______, which improves fitness.

A．burn calories
B．build muscles
C．relieve back pains
D．reduce high blood pressure
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单项选择题
Cardiovascular exercise helps ______.
A．one to work more efficiently
B．to promote a strong heart
C．to lose weight
D．one to sleep better
单项选择题
The monument was dedicated to ______ in the Second World War.
A．4,000 American heroes killed
B．all American soldiers killed
C．all Americans who took part
D．all the soldiers who fought in the Pacific or the Atlantic theatre
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