单项选择题

Practically all animals communicate either through sounds or through soundless codes.

A．Certainly
B．Probably
C．Almost
D．Absolutely
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单项选择题
The policemen acted quickly because lives were at stake.
A．in danger
B．in difficulty
C．in despair
D．out of control
单项选择题
I'd very much like to know what your aim in life is
A．thought
B．idea
C．goal
D．plan
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