单项选择题

A: Hello. May I speak to Peter
B: ______

A．Sorry, the number is engaged. Will you hold
B．Yes, speaking.
C．Hello. Who are you, please
D．Hello. Thank you for callin
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单项选择题
In order to understand the concept of infinity, we must think in much broader terms than we are accustomed to.
A．are aware of
B．are convinced of
C．are devoted to
D．are used to
单项选择题
She displayed great expertise in bringing the horse under control and thus won the first prize in the race.
A．skill
B．exercise
C．experience
D．expert
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