单项选择题

One good way to get vitamin D is to__________.

A．sleep with your windows open
B．play in the sunshine
C．eat plenty of fresh vegetables
D．take some medicine
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单项选择题
What is tickets now called
A．English disease.
B．French disease.
C．The article does not say.
D．Children disease.
单项选择题
The increase of rickets in England was caused by__________.
A．windows
B．a tax
C．fog
D．bad weather
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