Teenagers who spend hours in front of the television may have a poorer diet as young adults.

A study,which included nearly 1,400 high school students,found those who watched TV for five hours or more per day had less healthy diets than peers(同龄人)five years later. Why does this happen? Should the parents take any measures?

On the one hand,people who spend a lot of time in front of the TV, especially teenagers,may snack more,and that may affect their long-term diet quality.

On the other hand,TV ads for fast food,sweets and snacks tempt teenagers to eat more of those foods. And TV time might also replace exercise time for some kids.

Lead researcher Dr. Daheia J. Barr-Anderson,of the University of Minnesota in Minneapolis,told Reuters Health a clear correlation between TV time during high school and diet quality in young adulthood. While the heaviest TV viewers were eating the most junk food , those who'd watched less than two hours per day had the highest intake(吸收)of fruits,vegetables, whole grains and high-calcium food. In her opinion,parents should limit and monitor TV viewing.

As far as I am concerned,children should watch no more than two hours of television per day. And parents should set a good example by eating right,being physically active and curbing their own TV time.

1. What's the best title for this passage?

A. People should keep away from TV to keep healthy.

B. Teenagers' TV time may affect their diets later.

C. Why do teenagers like TV"

D. Parents' own habits may affect children later.

2.According to the passage,heavy TV viewers tend to_

A. eat more fruits B. eat less junk food

C. take in fewer vegetables D. take in high-calcium food

3.What suggestion does the author give the parents?

A. They must watch TV with their children.

B. They should forbid the children to watch TV.

C. They should pay attention to nutrition in diets.

D. They can't do what they don't want their children to do.

4.The underlined word“curbing" in the last paragraph can be replaced by

A. adding B. checking C. controlling D. stopping

阅读下面短文,从短文后各题所给的四个选项(A, B, C, D)中,选出可以填入空白处的最佳选项,并在答题卡上将该项涂黑。

Americans prefer to try every way to have fun. For example, they drive their own cars, some even tow a small boat after vehicle. They start from Los Angeles, California under sun, ____ through four or five hundred miles to go to La Fulin, Colorado to spend weekends ____ Chinese people are still busy with work, and have dinner at home together with families on weekends or ____ time watching TV.

The difference is mainly due to cultural customs and traditions ____ the two countries. It is said that Chinese people are living for others, while Americans are for ____.When Chinese people come to the United States, they fight for ____ first, and then desperately make money after they are recognized by others. It seems that, the purpose to earn money is not to enjoy life, __47__ for their following generations: sons and daughters and even grandchildren. Chinese people prefer to save money ___ emergency' such as illness. Although Chinese people with ____ in the United States don't need to worry about their own social welfare and health insurance, they work still very hard, ____ they hope that they can save more money.

Chinese people's interest is in the amount on the passbook, so they spend ____ money usually. Most of Chinese are very thrifty, and they are ____ to spend money, but there are exceptions. They are willing to spend money on their ____. Many Chinese people think that, they endure many ____, so they wish that their children could live much better. Therefore, in the United States elementary schools, you can see that those who ____the best, with more pocket money are Chinese students. In contrast, American children dress very simply, with just a little pocket money.

____ Chinese, Americans believe in living for themselves. They do everything for their own. ____, they earn money to enjoy a ____ life, and pursue a higher quality of life. As for their own parents or children, they think that parents have their own pension and social welfare, and children should live a(n) ____ life when they are 18 years old. So they could boldly spend money on themselves. __ _, Americans save little money. In the street, it is easy for Chinese to take out 300-400 dollars, but it is hard to say for Americans.

1.A. running B. driving C. going D. walking

2.A. until B. if C. while D. when

3.A. spend B. take C. cost D. pay

4.A. through B. for C. among D. between

5.A. themselves B. theirs C. them D. others

6.A. survival B. remainder C. existence D. material

7.A. or B. nor C. but D. and

8.A. in possession of B. on account of C. in spite of D. in case of

9.A. identity B. force C. fame D. power

10.A. though B. unless C. so D. as

11.A. large B. few C. much D. little

12.A. easy B. reluctant C. willing D. happy

13.A. children B. relatives C. parents D. friends

14.A. hardships B. problems C. difficulties D. sufferings

15.A. match B. decorate C. dress D. wear

16.A. Different from B. Interested in C. Similar to D. Thanks to

17.A. Otherwise B. However C. Therefore D. Since

18.A. better B. well C. good D. rich

19.A. single B. independent C. different D. comfortable

20.A. In that case B. As a whole C. In this way D. As a result

Dolphins(海豚) live in a dark underwater world. It’s often impossible to see each other or anything else around them, so sound plays an important role in their survival. To communicate with each other, dolphins produce all kinds of sounds.

Only other dolphins understand what the sounds mean. Scientists haven’t uncovered their secret communication, except for one kind of whistle. It might last less than a second, but this whistle is a big deal. Why? Because these whistles are actually names of dolphins - and every dolphin has one. Scientists call these sounds a “signature whistle.” When other dolphins hear the whistle, they know which dolphin is calling.

Dolphins often hunt by themselves but still need to stay connected to the group. Since they can’t always see each other, dolphins use their signature whistles to check in with other dolphins hundreds of yards away. “In coastal areas, dolphins exchange whistles even when they’re a third of a mile apart,” says Greg Campbell, who studies animals. That means dolphins shout out to group members that might be nearly five football fields away.

What’s amazing is who names the baby dolphin. Not the mother. Not an auntie dolphin or another group member. Scientists believe the baby dolphin itself comes up with the signature whistle. Like human babies, a baby dolphin plays with sounds throughout its first year. While testing its sound skills, a baby dolphin is doing something amazing. It’s creating or figuring out its signature whistle. How or why it chooses its signature whistle is not clear. Studies show that most of the time the signature whistle is nothing like its mother’s or group members’ whistles.

When the baby dolphin is about a year old, its signature whistle is set. It repeats it of ten so the other dolphins learn to recognize it.

Deciphering(破译) dolphin names is just the beginning of figuring out what dolphins communicate about. Do they chat about sharks? Discuss the tides? Maybe they even have a name for people. Someday scientists to decipher the rest of dolphins’ communication.

1.Sound is important for dolphins because of ______.

A.their poor sense of direction

B.their living environment

C.their strong enemies

D.their big groups

2.The dolphin’s signature whistle ______.

A.lasts along time

B.can travel long distances

C.is especially helpful in hunting

D.can be recognized by other animals

3.The author writes the text mainly to ______.

A.encourage readers to study dolphins

B.tell reader s how dolphins communicate

C.show how lovely and clever dolphins are

D.introduce a special sound made by dolphins

4.A baby dolphin gets its name ______.

A.soon after it was born

B.according to its size

C.all by itself

D.with the help of its group

I hate nosy (爱管闲事的) neighbors and it’s very unlucky that I had one for myself. They moved in a couple of months back and although I never felt that they were a strange family, I’ve always hated the way they get “too close” to me, my house, my garden, and even my garbage cans.

One day, my neighbors were mowing their lawn (草坪). My garbage cans were near their lawn. For some strange reason, I found the wife looking through my garbage cans. I felt angry but since they were from a different culture, I thought that maybe it was “normal” from their ideas.

That afternoon, the couple knocked on my front door. When I opened, they gave me a plastic bag. Inside were my old daily bills, credit cards and bank statements, and an old birthday card that my old uncle sent. They said that they were returning them to me because these documents contained very private information that may be used by others.

I’ve heard of it before. I asked them how those documents can be used by others and they started telling me their very own experience, which forced them to leave their home and move next door to us. The wife told me that she never destroyed the bills. They also had a “nosy neighbor” who looked through their garbage cans which they actually thought was pretty strange. Little did they know that this “nosy neighbor” was collecting their personal information from their rubbish. Then all their money was taken out from the bank by their neighbor.

It was a very painful experience for all of them and they wanted to leave it all behind so they left. I was very thankful. They were not nosy neighbors. They simply didn’t want us to experience the same thing that they did.

1.What made the author angry?

A. His neighbor’s wife was looking through his rubbish.

B. His neighbors were mowing their lawn one morning.

C. His neighbors got too close to his own home.

D. His neighbors came to knock at his door at night.

2.Why did the couple come to the author’s home?

A. To introduce themselves to the author.

B. To get to know each other better.

C. To return the documents to the author.

D. To borrow some money from the author.

3.Which of the following can we infer from the last paragraph?

A. The author was kind and helpful to the neighbors.

B. The neighbors had to move from place to place.

C. The neighbors didn’t have enough money.

D. The author changed his idea about his neighbors.

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