单项选择题

Questions 22 to 25 are based on the conversation you have just heard.

A．It can be even higher.
B．It’s very good.
C．It’s the same as that of post office.
D．It varies with the person’s experience.
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单项选择题
A．Because it keeps you calm.B．Because it strengthen your memory.C．Because it stimulates your nerve activity.D．Because it improves your problem-solving strategies.
A．Because it keeps you calm.
B．Because it strengthen your memory.
C．Because it stimulates your nerve activity.
D．Because it improves your problem-solving strategies.
单项选择题
A．To prevent car accidents.B．To monitor the driver’s health.C．To drive the car automatically.D．To measure the driver’s pulse.
A．To prevent car accidents.
B．To monitor the driver’s health.
C．To drive the car automatically.
D．To measure the driver’s pulse.
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