单项选择题

It's time that we ______ proper measures to protect the environment.

A．take
B．are taking
C．took
D．have taken
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单项选择题
Without water ______ living things could survive.
A．no
B．anything but
C．no one
D．nothing but
单项选择题
These animals are more ______ green colour; they always make for the tag with various shades of green.
A．sensitive to
B．anxious for
C．keen on
D．displeased with
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