閱讀理解。

It is 7 am and the alarm is going off. You know you have to be out of bed to catch the bus. But the urge to bury yourself in the bed is ever so strong.

Sounds familiar? Why is it that teens find it difficult to get themselves out of bed in time every morning or stay sharp and focused during the first couple of hours of school?

During adolescence, the body goes through many changes and these include a shift in sleep patterns. Researchers from MIT have been tracking the body's need for sleep in teenagers. They found that though adolescents need as much as 9.5 hours of sleep a day, they get to bed later and later with each passing year. In fact, the sleep cycle shifts later by as much as 12 to 18 minutes each year between the ages of 10 and 20! So by the time a 10?year?old who sleeps at 8 pm grows to be 17 or 18, his body naturally wants to stay up till 10：30 pm or 11 pm.

According to researchers, this is because of a hormone called melatonin (褪黑激素) that is secreted (分泌) by the pineal gland — a tiny structure deep inside the brain. Melatonin regulates the body's natural day?night rhythms. It causes a person to become sleepy by lowering his body's core temperature. In teens, melatonin is secreted much later in the evening and continues to increase throughout the night. This makes it difficult for teens to fall asleep earlier as they did in their younger years. Likewise, the effect of melatonin continues until much later in the morning, making it hard for them to wake up early.

A study found that at least one in four teens is tired and falls asleep in school at least once a week. During sleep, important body functions and brain activities happen. So how can teenagers get their sleep enough? The American Academy of Pediatrics (AAP) recommends that middle and high schools should start later — not before 8：30 am. This should give teens some more time to sleep at night.

1.From Paragraph 2, we can learn that if you sleep late, the next day you should ________.

A．stay sharp B．skip breakfast

C．get up late D．stay up late

2.What does the underlined word “this” in Paragraph 3 refer to?

A．The students want to stay up.

B．The shifts of the sleep cycle.

C．The pineal gland secretes melatonin.

D．The adolescents sleep late.

3.The teens go to sleep later than before because ________.

A．melatonin is secreted much later

B．melatonin regulates the sleep time

C．they sleep a lot in the daytime

D．they need to finish their homework

4.According to AAP's recommendation, middle and high schools should ________.

A．let teens sleep in the day

B．let the students be active

C．delay the start time

D．start later at 8 am

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語(yǔ)法填空。

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閱讀七選五。

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閱讀理解。

University Can Wait

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完形填空

On a hot summer day in America, a little boy decided to go for a swim in the old swimming hole behind his house. He dived into the cool water, Not _________that as he swam towards the middle of the lake, a crocodile (鱷魚(yú)) was swimming toward him.

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_________ , after weeks and weeks in the hospital, the little boy survived. His 55 were extremely scarred(留下疤痕) by the attack of the animal. And, on his arms, were deep scratches(抓痕) where his mother's fingernails dug into his flesh in her effort to hang on to the son she loved.

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Never judge another person's _________ , because you don't know _________they were made.

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2.A. behind the house B. in the house C. in the lake D. on the shore

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5.A. alarmed B. amazed C. calm D. hopeful

6.A.Thus B. So C. therefore D. However

7.A. author B. hunter C. mother D. crocodile

8.A. hugged B. stared C. grabbed D. combined

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10.A. fiercer B. stronger C. faster D. heavi er

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12.A. happened B. predicted C. pretended D. bet

13.A. gathered B. gained C. shot D. cut

14.A. importantly B. beneficially C. surprisingly D. Fortunately

15.A. arms B. legs C. fi ngers D. spot

16.A. helped B. saved C. interviewed D. consulted

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完形填空

閱讀下面短文，從短文后各題所給的四個(gè)選項(xiàng)（A、B、C和D）中，選出可以填入空白處的最佳選項(xiàng)，并在答題卡上將該項(xiàng)涂黑。

My father was a highly educated, intelligent gentleman. He could debate or discuss for hours on almost any topic and hold your _________ in the process. I thought there was nothing he wasn’t _________ to do.

A few days before my younger brother’s 7th birthday, Dad planned to assemble（裝配）a new _________ as a special birthday surprise. After nearly an hour of _________ the instructions, Dad was still unable to _________ the new bike together. Later he _________ the paper of instructions, _________ up his tool box, and decided to take the bike back to the local toy store and pay extra _________ to have it correctly assembled there. _________ an idea came to him, as he called out to Lovett, the quiet little man who cut our grassland.

“Lovett, have you ever assembled a boy’s bicycle?”

As Lovett walked towards the bike, Dad handed him the _________ . Lovett handed it back to him, saying, “No, thanks. I can’t read. When you can’t read, you have to _________ .” Less than 15 minutes later, the new bicycle was _________ assembled, with no _________ parts remaining. Dad shook Lovett’s hand, patted him on the back, thanked him, and hid the bike.

On the night after my brother received his shiny new gift, Dad announced at the family dinner table what had happened several days earlier. He took great _________ in telling it over and over again — he used it as an example of thinking.

He did not refer to illiteracy（文盲）, but strongly taught us to use our _________ . The joke was on my father, _________ he was able to turn it into a learning tool, and I liked him even more after that incident. I also gained a new _________ for Lovett. To me he had _________ been the old yard man who didn’t _________ much, but after that day, he seemed to smile _________ , even walk taller. It’s amazing what a real nod of approval can do to lift people up.

1.A. belief B. breath C. view D. attention

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12.A. partly B. largely C. hardly D. fully

13.A. separate B. different C. major D. spare

14.A. care B. action C. delight D. risk

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16.A. so B. but C. or D. and

17.A. respect B. reward C. relief D. regard

18.A. never B. ever C. always D. often

19.A. say B. show C. care D. earn

20.A. colder B. weaker C. broader D. grayer

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