单项选择题

Questions 26 to 29 are based on the passage you have just heard.

A．8 years.
B．16 years.
C．20 years.
D．30 years.
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D
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 warm the driver.
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 warm the driver.
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