单项选择题

A．Three times.
B．Six times.
C．Eight times.
D．Twelve times.
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单项选择题
A．An economic policy of a country.B．An economic policy of a family.C．TV programs designed for a family.D．A birth control policy of a country.
A．An economic policy of a country.
B．An economic policy of a family.
C．TV programs designed for a family.
D．A birth control policy of a country.
填空题
To calculate the calories expending to digest the food, you can multiply the number of calories you eat by ______.
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