单项选择题

According to the theory of evolution, all living species are the modified （）of earlier species.

A．descendants
B．dependants
C．defendants
D．developments

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单项选择题
If we continue to ignore the issue of global warming, we will almost certainly suffer the （）effects of climatic changes worldwide.

A．dubious
B．drastic
C．trivial
D．toxic
单项选择题
Back in the days when people traveled by horse and carriage, Karl Benz （）the world with his extraordinary three-wheeled motor vehicle.

A．inhibited
B．extinguished
C．quenched
D．stunned
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