单项选择题

A．They liked to have music in the operating room.
B．They solved problems better while listening to music they liked.
C．They preferred classical music.
D．They performed better when they used headphones.
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单项选择题
A．She spends too much money. B．She likes money too much. C．She enjoys going out for shopping. D．She likes to argue about anything.
A．She spends too much money.
B．She likes money too much.
C．She enjoys going out for shopping.
D．She likes to argue about anything.
单项选择题
A．Crop production became increasingly specialized. B．Economic depressions lowered the prices of farm products. C．New banking laws made it easy to buy farmland. D．The United States increased its agricultural imports.
A．Crop production became increasingly specialized.
B．Economic depressions lowered the prices of farm products.
C．New banking laws made it easy to buy farmland.
D．The United States increased its agricultural imports.
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