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A．Green.
B．Red.
C．White.
D．Black.
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单项选择题Satellite phones and Professional Mobile Radios are a kind of cellphone.

A．Y
B．N
C．NG

单项选择题A．He wanted to travel.B．He found his job boring.C．He was not qualified to be an engineer.D．He was not happy with the new director.

A．He wanted to travel.
B．He found his job boring.
C．He was not qualified to be an engineer.
D．He was not happy with the new director.