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．The woman had a toothache.B．She wanted to buy some aspirin.C．She was a regular patient of Dr. Patrick.D．Dr . Patrick was very busy.
A．The woman had a toothache.
B．She wanted to buy some aspirin.
C．She was a regular patient of Dr. Patrick.
D．Dr . Patrick was very busy.
单项选择题
A．The salesman.B．The man.C．Herself.D．A tutor.
A．The salesman.
B．The man.
C．Herself.
D．A tutor.
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