单项选择题

How often should the bus come to their stop

A． Every twenty minutes.
B． Every half an hour.
C． Once a day.
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单项选择题
A．niceB．worseC．nicerD．bad
A．nice
B．worse
C．nicer
D．bad
单项选择题
When would Uncle Smith be free
A． On Saturday.
B． From Monday to Friday.
C． On Sunday.
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