单项选择题

A．The cassette player
B．The sales slip.
C．Worth of tapes.
D．Warranty’s expire
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单项选择题
A．Motor vehicles were constantly arriving or departing.B．Tasty food.C．A comfortable, medium-sized hotel.D．Old-fashioned servic
A．Motor vehicles were constantly arriving or departing.
B．Tasty food.
C．A comfortable, medium-sized hotel.
D．Old-fashioned servic
单项选择题
The principle discovery in this century shows ______ .
A．man has overthrown Newton' s laws of physics
B．man has solved a new set of gigantic puzzles
C．man has lost many scientific discoveries
D．man has given up some of the once accepted theories
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