单项选择题

The principle discovery in this century shows _________.

A．man has overthrown Newton's laws of physics
B．man has solved a new set of gigantic puzzles
C．man has lost many scientific discoveries
D．man has given up some of the once accepted theories

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单项选择题

According to the passage, which of the following is the author's opinion

A．All criminals should be required to carry cards read: "Fragile: Handle with Care."
B．Capital punishment is the only way to deter criminals.
C．Society is to blame.
D．All criminals need hospital treatment.

单项选择题

Which of the following is true according to the passage

A．There has been a marked trend in society towards the humane treatment of less fortunate members.
B．Everyone in society thinks it reasonable that all criminals should be punished.
C．The author sympathizes with all criminals.
D．Robbers usually think twice before shooting.