单项选择题

A．Before economics.
B．In about an hour.
C．The next day.
D．During economics class.
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单项选择题
A．Those who know how to program computers.B．Those who get special aid from their teachers.C．Those who are very hardworking.D．Those who have well-educated parents.
A．Those who know how to program computers.
B．Those who get special aid from their teachers.
C．Those who are very hardworking.
D．Those who have well-educated parents.
单项选择题
A．She is serving her guests.B．She is singing songs.C．She is working hard.D．She is looking at the city.
A．She is serving her guests.
B．She is singing songs.
C．She is working hard.
D．She is looking at the city.
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