单项选择题
A. people can’t fall asleep B. people may feel relaxed C. people’s blood pressure increases D. people may find a more comfortable position
A. 2.5 percent. B. 4 percent. C. 7 percent. D. It’s hard to say.
A. Their favorite player will not turn up for the match. B. The bad weather will affect the players’ performance. C. Their favorite player may be beaten down by his opponent. D. The match will last for a long time.