单项选择题

People who are unhappy ______.

A．always consider things differently from others
B．usually are influenced by the results of certain things
C．can discover the unpleasant part of certain things
D．usually have a fault -finding habit

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单项选择题

Which of the following statements is not true according to the passage

A．We should pity all such unhappy people.
B．Such unhappy people are critical about everything.
C．Recognizing the bad effects of the habit the unhappy people may get rid of it.
D．Such unhappy people are also not content with themselves.

单项选择题

The rapid development of laser techniques has meant that ______.

A．surgery is likely to improve considerably
B．in another ten years we shall be able to cure cancer
C．in future all the diseases can certainly be cured
D．operations will be performed more complicatedly in the future