《2025年玩转全课程七年级英语》

Human beings go through 1. five stages during sleep. In the first stage, your muscles relax, your body temperature gets a bit cooler and your heartbeats become 2. slower. In the next stage, you fall into a light sleep. At this point, you can be 3. woken up easily. As you enter the third stage, your blood pressure lowers and your body becomes less sensitive to the environment. If you are awakened at the fourth stage of sleep, you're likely to be 4. confused for a while. The final stage of sleep is called REM sleep. REM stands for “5. rapid eye movement”. REM sleep is when most dreams occur.

答案： A. 1. five 2. slower 3. woken 4. confused 5. rapid