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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单项选择题

According to the passage, a good brand name ______.

A．must be shown in pictures
B．must be advertised a lot
C．is attractive to customers
D．is always full of humor

单项选择题

How long has the project been operating

A．One year.
B．Two years.
C．Three years.
D．Four years.