单项选择题

A．The guided tours.
B．University Books.
C．The Student Federation.
D．A volunteer group.
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If you want to enjoy better picture and sound quality, it is recommended that you use the ______ video cassette tapes.
单项选择题
A．Over 30 million men.B．Over 30 million middle-aged men.C．Those energetic Americans.D．Americans of both sexes and all ages.
A．Over 30 million men.
B．Over 30 million middle-aged men.
C．Those energetic Americans.
D．Americans of both sexes and all ages.
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