单项选择题

Questions 22 to 25 are based on the passage you have just heard.

A. It increased the students’ white blood cell count.
B. It increased some students’ energy level.
C. It released a natural painkiller in some students’ bodies.
D. It improved the students’ ability to play musical instruments.
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单项选择题
A. He and Elizabeth argued recently.B. He heard Elizabeth did poorly on the last test.C. He doesn’t want to bother Elizabeth so late in the evening.D. He’d rather study in his own dormitory.
A. He and Elizabeth argued recently.
B. He heard Elizabeth did poorly on the last test.
C. He doesn’t want to bother Elizabeth so late in the evening.
D. He’d rather study in his own dormitory.
单项选择题
A. Precious metals. B. Population pressures.C. Government policies. D. Agricultural practices.
A. Precious metals.
B. Population pressures.
C. Government policies.
D. Agricultural practices.
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