单项选择题

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

A．insane
B．exempt
C．intact
D．extinct
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单项选择题
Around 80 percent of the ______ characteristics of most white Britons has been passed down from a few thousand Ice Age hunters.
A．spontaneous
B．intelligible
C．genetic
D．random
单项选择题
Fashion designers are rarely concerned with vital things like warmth, comfort and ______.
A．durability
B．capability
C．stability
D．availability
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