单项选择题

An international treaty signed several years ago bans trade in plants and animal of endangered species.

A．forbids
B．eliminates
C．promotes
D．protects
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单项选择题
Sometimes the messages are conveyed through deliberate 'conscious gestures', other times, our bodies talk without our even knowing it.
A．definite
B．intentional
C．interactive
D．delicate
单项选择题
A good employer gives hints to his or her employees without interfering with their creativity.
A．freedom
B．assistance
C．clues
D．funds
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