单项选择题

A．It keeps blood vessels from being blocked.
B．It speeds up their recovery after surgery.
C．It increases the blood flow to the heart.
D．It adjusts their blood pressure.
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单项选择题
A．Because they are the warmest.B．Because they are the most fashionable.C．Because they don’t get stuck in the snow.D．Because they are unbelievably comfortable.
A．Because they are the warmest.
B．Because they are the most fashionable.
C．Because they don’t get stuck in the snow.
D．Because they are unbelievably comfortable.
单项选择题
A．He should see a doctor.B．He should abandon the idea.C．He should visit a fitness trainer.D．He should start with a light workout.
A．He should see a doctor.
B．He should abandon the idea.
C．He should visit a fitness trainer.
D．He should start with a light workout.
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