单项选择题

The panda is an endangered species, which means that it is very likely to become （）without adequate protection.

A．intact
B．insane
C．extinct
D．exempt

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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
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
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