Trees are one of the oldest plants on the earth. Just like us, trees change a lot 1 they grow. At one to three years old, young trees learn to 2 themselves. For example, many tree grow thorns (刺)to tell animals 3 near. Most young trees have large and deep green leaves to 4 enough sunlight and turn it into their food and energy. When trees are four years old, they are strong enough to 5 the challenge(挑战)in life. At the age of fifteen, they become young adults and grow more 6 . They will have their own flowers and fruit. After the trees are twenty to twenty-five years old, they are called real adults because they reach their 7 . Adults trees give us oxygen and natural beauty. If we 8 them very well, they will live healthily for many years. As time goes on, trees begin older and older and even 9 . At this time, they still have their important places in nature and uses for people. 10 many ways, the life of trees is like our own life experience.
A．before B．when C．after D．since
A．protect B．provide C．prevent D．pollute
A．to go B．to leave C．not to go D．not to leave
A．enjoy B．keep C．stay D．catch
A．get B．receive C．face D．welcome
A．fast B．faster C．slow D．slowly
A．weights B．heights C．styles D．sizes
A．look for B．look after C．look out D．look at
A．die B．hurt C．waste D．throw
A．On B．In C．For D．At
For years scientists have been arguing about whether nature or nurture (后天) decides what people will be like. Is it nature— what people are (41) with— that decides what they will be like? (42) is it nurture —what(43) to people when they are born —that decides what they will be like?
Scientists have been studying twins to (44) if they can find the answer, because twins start out with the (45) DNA. Sometimes twins don’t live together at birth and grow up in different (46) and different places— so the nature is the same for both, but the nurture is different.
When scientists (47) these twins in their later life, they some times find some surprising (48).
Jim Springer and Jim Lewis were adopted（收养）by two different families at birth. They first met each other again thirty-nine years (49) and discovered they had a lot in (50). Both had been (51) twice. Their first wives were both named Linda and their second wives were both named Betty!
Each twin had a son — one called his son James Alan and the (52) called his son James Alan, too. Their children each had a dog called “Toy”. They even arrived at their first (53) in the same color of car.
So far twin (54) seem to show that both nature and nurture are important. What we have from birth, and how and where we live help to build (55) we are.
A．born B．grown C．taught D．made
A．So B．And C．If D．Or
A．pretends B．happens C．falls D．depends
A．hear B．win C．see D．plan
A．nice B．same C．full D．free
A．families B．cities C．countries D．nations
A．believe B．suggest C．receive D．compare
A．numbers B．discoveries C．results D．decisions
A．ago B．later C．forward D．behind
A．common B．fact C．danger D．trouble
A．mentioned B．married C．succeeded D．interviewed
A．either B．else C．other D．only
A．competition B．education C．purpose D．meeting
A．studies B．movies C．challenges D．mysteries
A．what B．when C．where D．who
We have always been warned of the dangers of forest fires. They cause _____ 85 _____ to a forest. They kill many plants and animals in an eco-system, which is a group of living things and their environment. But have you ever heard of a forest fire that can be _____86_____ for a forest? People start some of the fires with a special reason to actually do good to the eco-system.
In fact, fires are a natural part of any eco-system. Without fires, the oldest and largest trees would stop sunlight from reaching the forest floor. Fires can _____87_____ some of these old trees. When the trees die, they provide something good for the earth. New trees can grow strong and healthy in their place.
Some trees even need fires to grow. These trees hold their seeds (种子) inside. Heat from a fire allows the coat of the seeds to open up. Then the seeds fall to the ground and have the _____88____ to grow/
Scientist, who know about nature’s needs, start some of these fires, called controlled burns. A fire is started and kept under control. This way, the fire does not spread out of the area or _____89_____ a after forest fires, they can go hungry _____90_____ their food has been damaged in the fire. Small, controlled fires mean than animals will not have to move far to find food. After some time, small plants begin to grow. Animals return soon after the plants return. This _____91_____ makes an eco-system.
So the next time you hear about a forest fire, think about the good as well as the bad. It may take a new eco-system a while to return, but it will likely come back stronger and healthier than ever.
A．illness B．difficulty C．damage D．flood
A．helpful B．powerful C．harmful D．awful
A．take the place of B． get ready for C． be bad for D．get rid of
A．time B．water C．chance D．skill
A．discover B．cover C．but D．waste
A．because B．although C．but D．so
A．almost B．again C．never D．even
Mosquitoes(蚊子)can be seen everywhere all over the world, especially in summer. And there are more than 2,500 kinds of them.
__43_likes the mosquito, but the mosquito may like you. She thinks your blood is delicious. She? Yes, she. It’s true that the male(雄性)mosquito doesn’t bite(咬)and only the female mosquito bites because she 44 blood(血液)to lay eggs. She is always 45 things or people she wants to bite. If she likes what she finds, she will bite. But if she doesn’t like your blood, she 46 to someone else for more delicious blood. Next time a mosquito bites you, just remember you’re different from others.
If the mosquito likes you, she will land on your body 47 letting you know. She bites you 48 quickly and quietly that you may feel nothing. After she bites, you will have an itch(痒)on your body because she puts something from her mouth together with your blood. By the time the itch begins, she has 49 .
And then what happens? Well, after her delicious 50 ,it’s dark. The mosquito feels 51 . She just wants to find a place to have a good rest. There, on a leaf or a wall, she begins to lay eggs, 52 eggs.A.Everyone B. No one C. Someone
A.needs B. need C. want
A.finding B. wants C. looking for
A.will turn B. turns to C. turn
A.with B. without C. after
A.so B. such C. very
A.flies away B. flew away C. flown away
A.breakfast B. dinner C. lunch
A.tiring B. tired C. relaxing
A.3 hundreds B. hundred of C. hundreds of
Do you know the 3-year-old girl named Dong Xinyi? She has a bright nickname(绰号)“Little Strong Girl”who looked after her disabled father. And many people all over China were moved by her.
When she was several months old, her father had an accident on his way home while riding his motorcycle and 38 his legs. Two years later, her mother left her father 39 the poor life. As an old saying goes,“The children of poor people do housework early.”Little Xinyi had to do family chores, such as cooking noodles, carrying water, cleaning rooms and washing clothes. She took good care of her father alone. The little girl brings happiness and hope to her poor family. And luckily, the local government has 40 medical treatment for her father. At the same time, the government is 41 planning to raise money for the girl’s 42 .Now, Dong Xinyi has got a chance to go to school like other kids.A.loses B. lost C. lose
A.because of B. instead C. because
A.provided B. noticed C. offered
A.too B. either C. also
A. information B. question C. education
Dean Bluey is 14-year-old boy from the USA. He became a hero after he saved(救)the life of a girl in another country.
A 14-year-old boy from the USA was described as a hero yesterday after he saved the life of a woman in another country．
One day，he 46 an email to a friend on the Internet．To his surprise, he received a message, saying “Help! Pain! Help!”．"The 47 was from Finland(芬兰)， thousands of kilometers away from America．Later Dean said to a reporter, “I didn't know 48 I should do. It was really difficult to tell if the message was real．”So Dean did nothing at first． 49 the message kept coming．Now it was easy to see that someone was in trouble. He 50 and found that the sender was a student called Tarja, 51 was ill, alone in a university library. What was 52 , there was no phone around her. Her only way of communicating with the world was by email. Dean telephoned the 53 immediately. And they realized that the situation was quite serious. They called the police in Finland. Then an ambulance(救护车) rushed to the library 54 , she was still alive and was sent to the hospital quickly.
“I'm glad she's OK,” Dean said. “It's hard to believe, but 55 saved her life.”
A．brought B．lent C．sent D．bought
A．speech B．message C．music D．telephone
A．how B．what C．where D．when
A．So B．And C．But D．Or
A．replied B．ran C．walked D．played
A．He B．She C．It D．I
A．worse B．better C．harder D．easier
A．teacher B．friend C．doctor D．police
A．Badly B．Hardly C．Luckily D．Carefully
A．fax B．better C．flight D．e-mail
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