单项选择题

Passage Two
Questions 29 to 32 are based on the passage you have just heard.

A．Physics.
B．Mathematics.
C．Environmental science.
D．Life science.
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填空题
It can be inferred from the passage that in a crowded elevator, a Frenchman could make no particular effort to ______ .
单项选择题
A．Because every species becomes extinct.B．Because humans 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 becomes extinct.
B．Because humans 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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