《2025年新坐标同步练习九年级英语全一册人教版青海专用》

Ⅵ.阅读表达。
For years, people thought that sleep was unimportant and inactive. Today, we know that sleep is important for good physical and mental (精神的) health. We have also learn-ed that while a person is asleep, the brain is very active.
(A) By doing this they have learned that there are five stages of sleep. Stage one sleep is very light. During this time, a person wakes up easily. ① As we move into stage ______, our eyes stop moving and our brain waves move more slowly. During stages three and four (often called "deep sleep"), it is very hard to wake up a person. During this time, the body repairs itself and makes more cells (细胞). In children and young adults, the body makes a chemical used for growing. In the·next stage—REM sleep—we begin to breathe faster and our eyes move around quickly, but ②我们的身体不动. During this stage, we dream.
The amount of sleep each person needs is different, and is often connected to age. (B) ③In general, babies need fifteen to six-teen hours of sleep a day. Children and teen-agers need nine to ten hours, while adults need six to eight. Over time, not having enough sleep—especially deep and REM sleep—can cause one to become sick more easily. Doctors also think that REM sleep is very important for learning, thinking, and memory. (C)
④ Scientists are continually learning more ______ sleep, but one thing they know for sure is this: for humans, it is as im-portant as food and water.
1. 请根据文意,在①句和④句的空白处分别填入一个合适的单词,使句意完整,符合逻辑。
①two ④about
2. 请根据文意,将②处下划线部分翻译成英语。our bodies do not move/we don't move ourselves
3. 请根据文意,写出③处下划线句子的同义句,每空一词。
In general, babies need to spend fifteen to sixteen hours sleeping a day.
4. 请根据文意,在文中(A)、(B)、(C)处,选出能够填入“To understand sleep, scientists study brain waves.”的最佳位置。A
5. 请根据文意,在文中找出能说明本文主旨大意的中心词。sleep

答案： 1. ①two ④about 2. our bodies do not move/we don't move ourselves 3. spend;sleeping 4.（A）5. sleep