单项选择题


Questions 11--13 are based on the following news on teeth protection. You now have 15 seconds to read Questions 11--13.
What kind of food is most likely to cause dental decay

A．Coca Cola.
B．Sausage.
C．Milk.
D．Fried chicken.
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单项选择题
How many decayed teeth does Dr. Faustick have
A．13.
B．None.
C．1.
D．A few.
单项选择题
He stayed in China for almost
A．20 years.
B．12 years.
C．7 years.
D．3 years.
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