单项选择题


A．sun
B．stars
C．compass
D．guide
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单项选择题
A．tellB．sayC．look forD．walk
A．tell
B．say
C．look for
D．walk
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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