单项选择题

Balzac drew a conclusion______.

A．after he made a careful study
B．carelessly
C．correctly
D．with disgrace
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单项选择题
Which of the following statements best summarizes the main idea of the paragraph
A．Science has made wonderful progress in recent years.
B．Machines can do the work of many unskilled laborers.
C．Man must use scientific progress for a better world.
D．It 'is foolish to ignore the help science can give to man.
单项选择题
Which word best describes the attitude of the author
A．Inquisitive.
B．Technological.
C．Pessimistic.
D．Constructive.
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