单项选择题

How long has the project been operating

A．One year.
B．Two years.
C．Three years.
D．Four years.
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单项选择题
Who paid for the project
A．The teachers.
B．The children's parents.
C．The federal government.
D．A certain company.
单项选择题
According to the passage, what is the schoolhouse-on-wheels
A．It is a mobile classroom.
B．It is a truck used as a house.
C．It is a truck used for picking the children up to school.
D．It is a house like a truck.
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