单项选择题

A．He is too sick to take his brother to the airport.
B．He picked up his brother last night.
C．His brother’s flight was canceled.
D．His brother has changed his plans.
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单项选择题
A．Drivers-to-be.B．Traffic regulation makers.C．License examiners.D．Policemen.
A．Drivers-to-be.
B．Traffic regulation makers.
C．License examiners.
D．Policemen.
单项选择题
A．To demonstrate the importance of public health laws.B．To point out that without luck businesses will not succeed.C．To explain how traveling led to new inventions.D．To illustrate the importance of having the right product at the right time.
A．To demonstrate the importance of public health laws.
B．To point out that without luck businesses will not succeed.
C．To explain how traveling led to new inventions.
D．To illustrate the importance of having the right product at the right time.
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