单项选择题

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

A. Background music was originally played live during World War II.
B. People might get fed up with hearing background music all day long.
C. People in Los Angeles love selling background music.
D. Background music is only played in public places.
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单项选择题
A. It’s not comfortable.B. It is difficult to steer.C. It can’t go long distances without recharging.D. Its engine easily overheats.

A. It’s not comfortable.
B. It is difficult to steer.
C. It can’t go long distances without recharging.
D. Its engine easily overheats.
单项选择题
A group of U.S. mental health professionals think that（）

A. it is unethical to use child psychologists to help marketers target kids
B. it is wise for marketers to use knowledge about children’s psychology for marketing
C. children’s behavior, fantasy lives, and even their dreams should be analyzed
D. APA should punish marketers for the marriage of psychology and marketing
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