you’ve understood all these rules.you’ll have no further difficulty. A. Unless B. Although C. Until D. Once 题目和参考答案——青夏教育精英家教网—

The definition of the standard kilogram is almost entirely wrong. Getting that definition right is a challenge that has tried the patience and intelligence of scientists for decades.
Scientists use just seven basic units to define all the other quantities we use — quantities such as speed or electric power. All of those basic units except the kilogram are themselves defined according to natural properties（属性）that are beyond human control.
For example, the standard second (time) is defined as a specific number of vibration（振动）of a type of radiation sent out by atoms of a special metal. The standard metre (length), in turn, is defined as the length of the path light travels under certain conditions.
Not so the kilogram. This orphan of the basic unit family is simply the mass of a small platinum-iridium alloy cylinder（铂—铱合金筒）locked away in a container maintained by the International Bureau of Weights & Measures in Sevres, France, near Paris. Official bodies around the world have copies of the cylinder.
Embarrassingly, the last time the copies were brought to Sevres for a checkup in the 1980s, officials found that some copies had gained about 20 parts per billion in weight compared to the master cylinder since the previous checkup in the 1940s. This implies that the master cylinder itself may be an inconstant standard.
Several efforts in several different countries are under way to redefine the kilogram according to basic physical quantities such as counting the actual number of atoms of a specific substance in a kilogram or the electromagnetic（电磁的）force that balances a kilogram mass against gravity. A project of the latter type at the laboratories in Gaithersburg, Md., hopes eventually to define mass by means of electrical units.
So far, none of these redefinition projects has borne fruit. They require the very accuracy of measurement and control of experimental conditions. The slightest influence — even a tiny change in weather — can ruin results. You’ve got to hand it to scientists who are willing to devote many years to such painstaking — but extremely important — research.
【小题1】 Compared with other basic units, the kilogram is ____.

the passage, to define the weight of mass by means of electrical units ____.

A．is the only way to redefine the kilogram scientifically

B．has been accepted as the only possible redefinition project

C．is not as complicated as people understand

D．has been considered by some scientists as a better approach

【小题4】 Which of the following cannot be concluded from the passage?

A．Scientists will achieve success in redefining the kilogram in the near future

B．Some scientists are trying to redefine the kilogram according to basic physical quantities.

C．The redefining of the standard kilogram is quite complicated and can be affected by a number of factors.

D．A number of experiments are being carried out to redefine the kilogram.

A few weeks after my first wife, Georgia, was called to heaven, I was cooking dinner for my son and myself. For a 11 , I had decided on frozen peas. As I was cutting open the bag, it 12 from my hand and crashed to the floor. The peas, like marbles(弹珠), 13 everywhere. I tried to use a broom(扫帚), 14 with each sweep, they just rolled across the kitchen.

For the next week, every time I was in the 15 , I found a pea——in a corner, or behind a table leg. They kept 16 . Eight months later I pulled out the refrigerator to clean behind it, and 17__ 12 frozen peas hidden underneath．

At the time I found those few remaining 18 , I was in a new relationship with a wonderful __19 I’d met in a support group. After we married, I was reminded 20 those peas under the refrigerator, and realized that my 21 had been like that bag of frozen peas. It had scattered(分散). My wife had died; I was in a new city with a busy job, and with a son having trouble 22 his new surroundings and the 23 of his mother. I was a bag of spilled frozen peas; my life had come apart and scattered.

When life gets you 24 , when everything you know comes apart, and when you think you’ll never 25 , remember that it’s just a bag of scattered frozen peas. The peas can be 26 , and life will move on. You’ll find all the peas 27 , including the ones that are hardest to find. And when you’ve got them 28 you’ll start to feel whole again.

The life you know can break apart at any time. But you’ll have to 29 , and how fast you collect your peas depends on you. Will you keep scattering them around with a broom, 30 will you pick them up one by one and put your life back together?

1.A. drink B. fruit C. vegetable D. meat

2.A. moved B. walked C. ran D. slipped

3.A. rubbed B. rolled C. grew D. existed

4.A. but B. and C. although D. so

5.A. bedroom B. living room C. kitchen D. storeroom

6.A. getting up B. turning up C. taking up D. using up

7.A. found B. ate C. left D. planted

8.A. presents B. cans C. vegetables D. peas

9.A. man B. child C. woman D. boy

10.A. of B. for C. with D. in

11.A. wife B. life C. son D. friend

12.A. turning to B. leading to C. adjusting to D. adding to

13.A. thank B. love C. help D. loss

14.A. down B. near C. close D. wide

15.A. get it B. make it C. take it D. leave it

16.A. grew B. bought C. collected D. frozen

17.A. eventually B. fortunately C. properly D. specially

18.A. both B. all C. either D. each

19.A. call on B. put on C. bring on D. move on

20.A. while B. because C. since D. or

Mackenzie Hughes had just returned from school and was waiting for her older brothers to arrive home. She was home alone 1 a man started knocking on the front door, turning the handle and trying to 2 .

She’s 12 years old and she was 3 . So she dialed 9-1-1 and reached the operator Rachelle Berry. After a brief talk, Berry 4 what was happening. “OK, hang on, OK? Can you get in a 5 ?” Berry asked. Mackenzie told Berry that her phone --- it wasn’t cordless (无绳的) --- wouldn’t reach into the cupboard. “Will the phone reach under your bed?” Berry asked 6 . “No,” Mackenzie said.

“Can you hide under a 7 and pull your bedspread over you?” That’s 8 what Mackenzie did. She hid under her blanket, holding the phone and listening to Berry’s voice.

Berry talked quietly, which 9 Mackenzie. It helped, too, when Berry told her to think of something 10 . “Try not to cry,” Berry told Mackenzie during the call. “ I know it’s 11 . Do you have something you can hold onto?” Mackenzie struggled to 12 tears. She couldn’t 13 anything without showing her hiding spot. “ It’s OK,” Berry said. “You’ve got me here with you.”

“He’s in my room,” Mackenzie 14 . “Now be quiet, OK? Just don’t talk,” Berry said. For much of the call, Berry dropped her voice to a whisper, 15 the intruder (闯入者) might hear her voice over the phone. 16 , the man came into her room, then left.

Berry told Mackenzie that the 17 were on their way. Minutes later, they arrived and 18 one man in the backyard and another man in a getaway car.

On Thursday morning, the Emergency Communications Bureau gave Mackenzie its Hero Award for her 19 . Berry also received high praise. And then it was off to school for Mackenzie. But first Berry had something to 20 to the middle-schooler: a cordless phone.

1. A．until B．before C．because D．when

2. A．get in B．get away C．get around D．get through

3. A．annoyed B．scared C．curious D．surprised

4. A．remembered B．realized C．reviewed D．recalled

5. A．bedroom B．kitchen C．cupboard D．bathroom

6. A．anxiously B．calmly C．carefully D．happily

7. A．sofa B．bed C．table D．blanket

8. A．ever B．never C．just D．still

9. A．worried B．helped C．moved D．upset

10. A．interesting B．strange C．wrong D．valuable

11. A．hard B．important C．useful D．possible

12. A．hold onto B．hold down C．hold back D．hold up

13. A．discover B．imagine C．reach D．invent

14. A．cried B．shouted C．whispered D．replied

15. A．assuming B．believing C．fearing D．confirming

16. A．Obviously B．Fortunately C．Probably D．Certainly

17. A．parents B．brothers C．police D．neighbors

18. A．met B．killed C．arrested D．found

19. A．contribution B．success C．kindness D．bravery

20. A．lend B．present C．show D．mail

My son and I were trying to sell the house we had repaired but in the barn(谷仓)there were bats(蝙蝠)and they would not leave. The barn was their home. They told us so in their own way. They hung there in the barn and seemed determined to stay for the season. Don’t worry about it, Dad, " Patrick said. They keep down the mosquitoes(蚊子).”

Unfortunately they also kept the buyers away. when we had asked a person to sell　the house for us he had refused to show it because of the bats. Bats are popular, “Patrick comforted me. They’re ecological(生态学的).”Isn’t there a machine you can buy that produces high frequency sounds to keep bats away?” “I don’t know,” said Patrick. But I like bats, and whoever buys this house will probably like them too. “Probably?” I hated that word. “How many bats are　there ,anyway?” “I counted about 90 last night,” said Patrick. “They were dropping out from under the edge of the roof.” “You mean there are more — outside?” “They’re everywhere, Dad. But look at it this way. When the cold weather comes, they’ll be off to Mexico. Maybe in the spring we can keep them out. Don’t worry about it,” he said for the hundredth time. “It’s not a problem.”

The bat expert I called was even more active than Patrick. I think you’ve got a large number there,” he said in wonder, I’ve been trying to attract bats to our house for 25 years. A single bat eats up his weight in mosquitoes and black flies three times every night. You’re a very lucky man.” I offered to share my luck with him. He could take them away. Bats have a remarkable homing instinct(本能),”he said, “They’d fly straight back even if I transported them 100 miles. Once they have settled, you can’t stop them from coming back.” I was silent.

Finally we managed to rent “(出租)the house to a young family, who were also interested in buying it. What about the bats?” I said to Patrick.

“Oh, they love the bats,” he said. “No mosquitoes. No black flies. It’s one of the things that attracted them.”

“Do you think they will really buy the blouse?”

“Probably.”

“Probably? Well, if they do ,I suppose I’ll have to admit that I was wrong.”

“You mean you’re going to eat your words?”

“Yes, I am.”

36. What was the problem the author had with his house?

A.?Bats were living in the barn and wouldn't go away.

B.?The author and his son couldn't sleep well because of the bats.

C.?The author and his son might be able to stay for the season.

D.?The house was still badly in need of repair.

37.?What did Patrick suggest the author should do to stop the bats living in the barn?

A.?He should buy a high frequency machine.

B.?He should move them one hundred miles away.

C.?He should reduce the number of mosquitoes.

D.?He should close the barn in the spring.

38.?Why did the author fall silent when he talked with the bat specialist?

A.?He felt sure about the situation.

B.?He found out that it would be impossible to remove the bats.

C.?He learned that he would be able to share his luck with the expert.

D.?He liked the advice given by the expert.

39?What happened regarding the house in the end?

A.?Some people agreed to rent the house.

B.?The author failed to find anybody who wanted to live in the house.

C.?The bat expert made the decision to buy the house.

D.?The bats left the house for Mexico in the spring.

40.?Why did the author think he might have to “eat his words”?

A.?He felt sorry for the bats.

B.?He might be mistaken about being unable to sell the house.

C.?He realized he might be wrong about the bats’ actions.

D.?He was happy about selling the house.

阅读下列材料，从所给的六个选项（A, B,C, D, E, F）中，选出符合各个小题要求的最佳选项，选项中有一项是多余选项。

The people below are all trying to choose which TV programme to watch. After the description of these people, there is information about six TV programmes A-F. Decide which programme would be most suitable for the person mentioned in questions 1-5 and then mark the correct letter (A-F) on your answer sheet. There is one extra paragraph about one programme which you do not need to use.

_________1.Although Rob lead a quiet life in a small village, that doesn’t stop him from wanting to find out about the latest scientific development.

_________2.Bella enjoys eating out but can’t afford to spend very much at the moment as she is saving for a holiday. She has never learnt how to cook, so now might be quite a good time to find out！

_________3.Dan is interested in taking wildlife photographs and enjoys the kind of programme which gives him a chance to see a professional photographer at work.

_________4.Gina is a music teacher. Although she prefers classical music, she likes to follow the kind of music that interests the teenagers she teaches.

_________5.Ron’s wife is in hospital. He wants to find a programme suitable for his three-year-old son while he gets on with the housework and prepares a meal.

TODAYS TELEVISION PROGRAMME PREVIEW

A. TV1 7:20 p.m. Find out more about Australia’s animal life. This film was made last year by one of Australia’s best-known cameramen, Dougie Bond. He spent over 200 hours filming the birds, animals and fish that inhabit this beautiful continent and for the first time brings some of these unusual animals to our TV screens.

B. TV3 9:00p.m. The popular science programme is back with the latest in technology and medicine. This week, cars that run on sunlight and the story of one baby’s fight to live.

C. TV2 8:10p.m. Do you think what goes into the food most of us eat every day of the week? Tonight’s programme takes a serious scientific look at the bread industry. Whether you bake your own bread or just enjoy buying it, this programme will give you an interesting insight into something most of us eat every day of the week.

D. TV1 5:15p.m. Busy parents? Bored children? Do you want something educational to entertain your children while you do something else? This popular magazine programme is for the under-fives. More music, fun, songs and games with Carla and Larry.

E. TV3 8:45p.m. If you’ve always wanted to cook, now’s your chance to learn. In the studio are two chefs who will take you through some simple recipes step by step. This is a repeat of the popular series shown last year, and available from good bookshops.

F. TV3 7:40p.m. The latest new music. Pete Hogg looks at the best of the current rap, raga and new jack swing plus new video releases. This is the programme that tells you all about what’s happening on the music scene and brings you interviews with tomorrow’s young artists.

试题分类