单项选择题

A．Green.
B．Red.
C．White.
D．Black.
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单项选择题
A．5,400,000 years.B．65,000,000 years.C．8,400,000 years.D．75,000,000 years.
A．5,400,000 years.
B．65,000,000 years.
C．8,400,000 years.
D．75,000,000 years.
单项选择题
The article deals with the employment of the future in the United States.
A．Y
B．N
C．NG
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