单项选择题

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

A. The Arctic land.
B. Iceberg.
C. Active volcano.
D. Ice age.
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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.
单项选择题
A. How to improve your reasoning ability. B. Why classical music is popular with math students. C. The difference between classical music and rock music. D. The effects of music on the results of math tests.
A. How to improve your reasoning ability.
B. Why classical music is popular with math students.
C. The difference between classical music and rock music.
D. The effects of music on the results of math tests.
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