单项选择题

A．Once a week.
B．Twice a week.
C．Once every three weeks.
D．Once every two weeks.
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单项选择题
A．Environment.B．Genes.C．Parents.D．Both A and B
A．Environment.
B．Genes.
C．Parents.
D．Both A and B
填空题
The more kinds of food we have, the more healthy we will be.
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