綜合閱讀。
   Have you ever stayed up late one night？Did you feel tired the next day？Did you feel bad-tempered？It is B your body missed its sleep!So why does a good night's sleep make you feel better？
   Scientists have studied sleep to find the answer to this question. （C）他們已經(jīng)發(fā)現(xiàn)了一些不同的原因。
   First，sleep helps your body stay healthy.Even though you are sleeping，your body is still active.Sleep gives your body a chance to repair itself. （1）
   （2）Sleep also helps your body to rest.How？Your body does not need as much energy when it slows down.The beat of your heart and your breathing rate become slower，which lowers your body's energy level.Your body needs rest after a busy day.
   （3）During the day your brain gathers informjye.aiion.At night while you are sleeping，your brain reviews everything that you did during the day.It saves some of your experiences so you can remember them.Some scientists think all this reviewing causes you to dream.
   （4）What happens if you do not have enough sleep？People who miss too much sleep have（A）trouble paying attention.They make more mistakes in their work.Scientists believe that people who miss more than three days of sleep may（A） become sick and even start seeing something that is not really there.
   Students need between 8 B 10 hours of sleep each night.What can you do to help give your body a good night's sleep？
   Ways to help you sleep
   ★Run and play outside during the day.
   ★Drink a glass of milk before going to bed.
   ★Go to bed on time.
   ★Read a book in bed.
   ★Have a dark，quiet room.
   Follow these steps and you will begin to feel relaxed and happy.Nothing else will help your body like a good night's sleep.
（1）（A）處近義詞

difficulties

difficulties

，

get

get

（2）B處填入適當(dāng)單詞

because

because

，

and

and

（3）C處翻譯成英語(yǔ)

They have found some different reasons.

They have found some different reasons.

（4）寫出本文的中心詞

Sleep

Sleep

（5）Sleep is important for your brain，too.放在（1）（2）（3）（4）哪處。

（3）

（3）