单项选择题

What did the study done with surgeons' show

A．They like 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

In the study of students exposed to classic music, what effect did the music have

A．It increased the students' while blood cell count.
B．It increased some students' energy level.
C．It improved the students' ability to play musical instruments.
D．It released a natural painkiller in some students' bodies.

单项选择题

What is the man doing

A．Making a gift for the woman.
B．Working on a class assignment.
C．Discussing his career.
D．Preparing to teach an art class.