单项选择题

Conversation One

A. The inventor decides who the expired patent goes to.
B. The inventor may strive for a longer valid time span.
C. The inventor will try hard to sell his products faster.
D. The inventor will hesitate when giving his data to the public.
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单项选择题
C
单项选择题
A. Over a million abandoned cars are towed from the streets each year.B. One third of the nation’s cars are abandoned in the streets.C. About two thirds of the abandoned cars aren’t removed.D. Cities spent little to control the accumulation of abandoned cars.
A. Over a million abandoned cars are towed from the streets each year.
B. One third of the nation’s cars are abandoned in the streets.
C. About two thirds of the abandoned cars aren’t removed.
D. Cities spent little to control the accumulation of abandoned cars.
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