阅读理解

Every hour spent outdoors each week can reduce a child's chance of becoming short-sighted by two per cent. Children who are short-sighted spend an average of 3. 7 fewer hours a week outside compared with those who have normal vision, a study has found.

Short-sightedness runs in families and has also been linked to a host of factors. They include the amount of time spent focusing on near objects and levels Gf physical activity. But simply spending time out of the house may be enough to protect the eyesight. Being outdoors can reduce the amount of time that children spend in reading or playing computer games, researchers said.

Between 15 and 20 per cent of British people are short-sighted, but the problem is much more serious in parts of East Asia. There, as much as 80 per cent of the population is short-sighted. One ?tudy compared children living in different countries. It found that those in Australia had better vision on average than people of the same age in China and Singapore. The Australian group read and achieved as much as those in other countries, but they were found to spend more time outdoors.

Dr Sherwin, one of the researchers who did the study, said the benefit from being outdoors could be linked to increased UV radiation(紫外线辐射).Short?sightedness is caused by having longer eyes and some studies have shown that some chemicals affected by UV rays may control the length of the eye. A lack of sunlight could make such chemicals grow too much, he explained.

He said, "It could be caused by not enough UV radiation, and it could also be caused by spending less time looking into the distance or not enough physical activity.”

1. What is the main idea of the passage?

A. Children's short-sightedness can be cured.

B. There are several causes of children's short?sightedness.

C. Spending more time outdoors can lead to better eyesight.

D. Children who spend more time outdoors are much healthier.

2.What does the underlined word "They" in Paragraph 2 refer to?

A.     Near objects,

B.     Levels of physical activity.

C.     Families which have short-sightedness.

D.     Some factors linked to short-sightedness.

 3. According to Paragraph 3, in the study children in Australia .

   A.     achieved less

B.     had poorer eyesight

C.     stayed outdoors more

D.     spent less time reading

4. Which of the following is NOT mentioned by Dr Sherwin as a cause of short-sightedness?

    A.     Receiving too Utile UV radiation.

B.     Not taking part in enough physical activities.

C.     Spending little time looking into the di.stance.

D.     Not eating enough food that is good for our eye?sight.

阅读理解

   We walked in so quietly that the nurse at the desk didn't even lift her eyes from the book. Mum pointed at a big chair by the door and I knew she wanted me to sit down. While I watched with mouth open in sur?prise, Mum took off her hat and coat and gave them to me to hold. She walked quietly to the small room by the lift and took out a wet mop(拖把).She pushed the mop past the desk and as the nurse looked up, Mum nodded and said,"Very dirty floors."

    "Yes, I,m glad they've finally decided to clean them, ,, the nurse answered. She looked at Mum strangely and said,"But aren't you working late?"

Mum just pushed harder, each swipe(拖一下)of the mop taking her farther and farther down the hall. I watched until she was out of sight and the nurse had turned back to writing in the big book.

After a long time Mum came back. Her eyes were shining. She quickly put the mop back and took my hand. As we turned to go out of the door, Mum bowed (鞠躬)politely to the nurse and said,"Thank you."

Outside, Mum told me, " Dagmar is fine. No fever."

"You saw her, Mum?"

   "Of course. I told her about the hospital rules and, she will not expect us until tomorrow. Dad will stop worrying as well. It's a fine hospital. But such floors ! A mop is no good. You need a brush ."

1.When she took a mop from the small room, what Mum really wanted to do was___________ .

   A.    to clean the floor

B.    to please the nurse

C.    to see a patient

D.    to surprise the storyteller

2.When the nurse talked to Mum she thought Mum was a_________ .

A. nurse                      B. visitor

C. patient                     D. cleaner

3. After reading the story, what can we infer(推断) about the hospital?

   A.    It is children's hospital.

B.    It has strict rules about visiting hours.

C.    The conditions there aren't very good.

D.    The nurses and doctors there don't work hard.

 4.From the text we know that Dagmar is most likely

   A.    the storyteller's sister

B.    the storyteller's classmate

C.    Mum's friend

D.    Dad's boss

5.Which of the following words best describes Mum?

   A.    Strange.

B.    Warm-hearted.

C.    Clever.

D.    Hard-working.

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