单项选择题

Questions 19 to 22 are based on the conversation you have just heard.

A. Two different types of bones in the human body.
B. How bones help the body move.
C. How bones continuously repair themselves.
D. The chemical composition of human bones.
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单项选择题
A. 1:30.B. 11:00.C. 9:30.D. 10:00.
A. 1:30.
B. 11:00.
C. 9:30.
D. 10:00.
单项选择题
A. Wait for the sale to start.B. Get further information about the sale.C. Call the TV station to be sure if the ad is true.D. Buy a new suit.
A. Wait for the sale to start.
B. Get further information about the sale.
C. Call the TV station to be sure if the ad is true.
D. Buy a new suit.
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