单项选择题

The survival ______ of some wild animals is not very high as they are ruthlessly hunted for their skins.

A．standard
B．scale
C．ratio
D．rate
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单项选择题
As to the lost world of Egypt, we know nearly everything ______ to know.
A．there is
B．it is
C．which is
D．what is
单项选择题
In New York City ______ has highly restrictive guidelines for ______ police may use their guns, the number of people shot by local cops soared in the past three years from 68 to 108.
A．there, where
B．there, when
C．it, where
D．which, when
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