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
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单项选择题
If one does not work out regularly, he may______.
A．easily catch a cold
B．easily get tired
C．easily get anxious
D．feel depressed
单项选择题
The college with the longest history in America is ______.
A．Yale
B．Princeton
C．Harvard
D．Columbia
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