单项选择题

A．It sends out signals for help.
B．It takes over the driving immediately.
C．It stops the car automatically.
D．It sounds an alarm to warn the driver
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单项选择题
A．Be ready to speed up.B．Be ready to slow down.C．Be ready to move to a slower lane.D．Be ready to move to a faster lane.
A．Be ready to speed up.
B．Be ready to slow down.
C．Be ready to move to a slower lane.
D．Be ready to move to a faster lane.
单项选择题
A．He is ready to help Prof. Wang.B．He will congratulate Prof. Wang.C．He will pay a visit to Prof. Wang.D．He will tell Prof. Wang the good news.
A．He is ready to help Prof. Wang.
B．He will congratulate Prof. Wang.
C．He will pay a visit to Prof. Wang.
D．He will tell Prof. Wang the good news.
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