单项选择题

A．Industry.
B．Health.
C．The future of our children.
D．Clean air.
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单项选择题
A．Frequently.B．Occasionally.C．Seldom.D．Regularly.
A．Frequently.
B．Occasionally.
C．Seldom.
D．Regularly.
单项选择题
A．Planning a sightseeing tour.B．Writing to his uncle.C．Arranging his class schedule.D．Reading a language textbook.
A．Planning a sightseeing tour.
B．Writing to his uncle.
C．Arranging his class schedule.
D．Reading a language textbook.
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