单项选择题

Questions 32 to 35 are based on the passage you have just heard.

A．Many species have developed a habit of migration.
B．Many species have become less sensitive to climate.
C．Many new species have come into existence.
D．Many species have moved further north.
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单项选择题
A．Their lack of concentration resulting from mental stress.B．The lack of consideration for them in equipment design.C．The probability of their getting excited easily.D．Their slowness in responding.
A．Their lack of concentration resulting from mental stress.
B．The lack of consideration for them in equipment design.
C．The probability of their getting excited easily.
D．Their slowness in responding.
单项选择题
A．Because every species become extinct.B．Because human beings are powerful enough to kill other species.C．Because of over-population.D．Because human being is still a young species though it is exploiting the environment.
A．Because every species become extinct.
B．Because human beings are powerful enough to kill other species.
C．Because of over-population.
D．Because human being is still a young species though it is exploiting the environment.
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