大家要好好背哦！

　　1．题目：The author mentions "pick-me-up" to indicate that
　　答案：C）coffee is a stimulant.
　　2．题目：Which of the following tells us how caffeine affects sleep？
　　答案：C）Caffeine halves the body's levels of sleep hormone.
　　3．题目：What does paragraph 3 mainly discuss?
　　答案：A）Different effects of caffeinated coffee and decaf on sleep.
　　4．题目：What does the experiment mentioned in paragraph 4 prove?
　　答案：D）Caffeine drinkers produce less sleep hormone.
　　5．题目：The author of this passage probably agrees that
　　答案：B）We should not drink coffee after supper.
　　速记口诀：

　　深夜喝咖啡
　　1．pick-me-up刺激物____________________
　　2．咖啡因减半荷尔蒙____________________
　　3．两种咖啡果不同____________________
　　4．咖啡饮者少激素____________________
　　5．不喝咖啡晚饭后____________________ [综合类Ｃ]