单项选择题

Questions 19 to 21 are based on the conversation you have just heard.

A．The ice in the Antarctic will never melt.
B．The disasters caused by icebergs are all over the world.
C．The Antarctic is hot with volcanoes.
D．Volcano can protect ice sheet from melting.
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单项选择题
A．It can measure the driver’s alcohol level in the blood.B．It bases its analysis on the driver’s heartbeat.C．It can quicken the driver’s response to emergencies.D．It monitors the signals transmitted from the driver% brain.
A．It can measure the driver’s alcohol level in the blood.
B．It bases its analysis on the driver’s heartbeat.
C．It can quicken the driver’s response to emergencies.
D．It monitors the signals transmitted from the driver% brain.
单项选择题
A．The effects of music do not last long.B．Piano music could interfere with your reasoning ability.C．Music, whether classical or rock, helps improve your memory.D．The more you listen to music, the higher your test scores will be.
A．The effects of music do not last long.
B．Piano music could interfere with your reasoning ability.
C．Music, whether classical or rock, helps improve your memory.
D．The more you listen to music, the higher your test scores will be.
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