单项选择题

A．Every day of the week.
B．Once every two weeks.
C．Once a week.
D．Twice a week.
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单项选择题
A．The tractor.B．The ear.C．The wheel.D．The steam engine.
A．The tractor.
B．The ear.
C．The wheel.
D．The steam engine.
单项选择题
A．Telling jokes.B．Failing asleep during class.C．Staying late after class.D．Eating in the canteen.
A．Telling jokes.
B．Failing asleep during class.
C．Staying late after class.
D．Eating in the canteen.
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