单项选择题

The passage recommends those dealing with computers to （）.

A．be reasonably doubtful about them
B．check ail their answers
C．substitute them for basic thinking
D．use them for business purpose only

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单项选择题
Lincoln was invited to speak at the National Soldiers Cemetery because he was （）.

A．a famous speaker
B．a very handsome man
C．President of the country
D．a popular statesman
问答题
A bridge would cost far more than a tunnel, but you would be able to go by rail or by car on a bridge, whereas a tunnel would provide a rail link only. ( Passage 3 )
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