单项选择题

A．Computers have become part of our daily lives.
B．People have different attitudes to computers.
C．Computers have advantages as well as disadvantages.
D．More and more families will own computers.
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单项选择题
A．Gold was discovered.B．The Golden Gate Bridge was constructed.C．The transcontinental railroad was completed.D．Telegraph communications were established with the East
A．Gold was discovered.
B．The Golden Gate Bridge was constructed.
C．The transcontinental railroad was completed.
D．Telegraph communications were established with the East
填空题
The only vehicle that didn’t hit an obstacle in the trial runs is ________________.
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