单项选择题

A．Camp in the mountains.
B．Stay at his own house.
C．Write to his girlfriend.
D．Hold his uncle’ s mails.
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单项选择题
The writer' s main purpose in writing the passage is to say that______.
A．science is just at its beginning
B．science has greatly improved man's life
C．science has made profound progress
D．science has done too little to human beings
单项选择题
What can' t be inferred from the 1 st paragraph
A．Scientific experiments in the past three hundred years have produced many valuable items.
B．For three hundred years there have been people holding hostile attitude toward science.
C．Modern civilization depends on science so man supports scientific progress unanimously.
D．Three hundred years is not long enough to settle back critical appraisal of scientific metho
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