【C1】______the very first day there was a tense moment and a hint of things to come. Blocke

s development and【C2】______ . The United States is very【C3】______ in this【C4】______ .

【C5】______ , it has good【C6】______ . In almost every【C7】______ of the country it is possible to live【C8】______ during the whole year. It is true that in the south it sometimes gets very hot and in the north very cold. But the people who live in these regions become【C9】______ to the climate and never【C10】______ much when the weather is either very hot or very cold.

In a large country there is usually a great【C11】______ of different physical characteristics. In the United States, there are wide plains and high mountains, thousands of lakes and rivers of all【C12】______ , cool forests and hot deserts, and a coastline several' thousand miles long.

The many lakes and rivers,【C13】______ he long coastline, have been【C14】______ great importance to the development of the country, since they made possible the easy【C15】______ of the people and all the things people【C16】______ . Ships and boats are still necessary and important. In modem【C17】______ ,【C18】______ , trains, automobiles, trucks and airplanes are doing much of the【C19】______ which was【C20】______ done by ships and boats.

【C1】

A．location

B．character

C．characteristics

D．differences

_____to find work, and there is usually a choice of public transport, so you don t need to own a car.【C2】______, there are a lot of interesting things to do and places to see.【C3】______, you can eat in good restaurants, visit museums, and【C4】______to the theatre and to concerts. What is more, when you want to relax, you can usually find a park【C5】______you can feed the ducks or just sit on a park bench and read a book. All in all, city life is full of variety and you need never feel【C6】______. However, for every plus【C7】______is a minus. For one thing, you might have a job, but【C8】______it is very well-paid, you will not be able to afford many of the things that there are to do, because living in a city is often very expensive. It is particularly difficult to find good, 【C9】______accommodation. What is more, public transport is sometimes crowded and dirty, especially during the【C10】______hours, and even the parks can become very crowded, especially on Sundays when it seems that every resident is looking for some open space and green grass. Last of all, despite all the crowds, it is still possible to feel very lonely in a city.

【C1】

A．easier

B．happier

C．sadder

D．harder

generally regarded as impolite. This is particularly true 【C1】______ women, and even more 【C2】______ if the inquirer is a man.

However, it is very 【C3】______ to ask children their age, and some adults may not mind 【C4】______ either. In fact, some elderly people are quite happy to 【C5】______ their age, especially if they feel they look young 【C6】______ their age. Nevertheless, it is not very wise to ask a(n) 【C7】______ question like" How old are you". If elderly people want to talk about their age, and perhaps receive a compliment on how young they look, they may easily 【C8】______ the topic themselves, and ask the other person to 【C9】______ how old they are. 【C10】______ such a question, it is quite acceptable to discuss age 【C11】______ . They normally expect to be complimented on their youthfulness, though rather than 【C12】______ that they look very old!

【C13】______ Westerners do not usually ask people directly how old they are, this does not 【C14】______ that they are not interested in knowing how old other people are. They may ask someone else 【C15】______ the information, 【C16】______ they may try to 【C17】______ the topic indirect-ly. Sometimes discussions about educational 【C18】______ and the number of years of working ex- periences may provide some 【C19】______ , but this is not always the 【C20】______ .

【C1】______

A．on

B．for

C．in

D．of

the Sun; in【C1】______at the Sun's very center. It is here that is to be found the【C2】______of the energy that the Sun pours out into space is【C3】______The energy takes the form. of light and heat. This energy is【C4】______at the center of the Sun as billions【C5】______billions of nuclei of hydrogen atoms【C6】______with each other and fuse together to form. nuclei of helium, and in doing so,【C7】______some of the energy that is【C8】______in the nuclei of atoms. The【C9】______of light and heat of the Sun【C10】______that some 600 million tons of hydrogen be【C11】______into helium(氦)in the Sun every second. This the Sun has been doing for several thousands of millions of years. The nuclear energy is released at the Sun's center as high-energy gamma radiation,【C12】______of electromagnetic radiation like light and radio waves, only of very much shorter【C13】______. This gamma radiation is absorbed by atoms inside the Sun to be【C14】______at slightly longer wavelengths. This radiation, in its【C15】______is absorbed and reemitted. As the energy filters through the【C16】______of the solar interior, it passes through the X-ray part of the spectrum【C17】______becoming light. At this stage, it has reached what we call the solar surface, and can escape into space without being absorbed further by solar atoms. A very small【C18】______of the Sun's light and heat is emitted in such directions that【C19】______passing unhindered through interplanetary space, it【C20】______the Earth.

【C1】

A．nature

B．fact

C．research

D．addition

to have such an important【C1】______of my work. but the real pleasure was in the work itself.

Scientific research is like an exploraion of a voyage of discovery. You are【C2】______trying out new things that have not been done before. Many of them will lead【C3】______and you have to try something different, but sometimes an experment does【C4】______and tells you something new and that it is really exciting,【C5】______small the new finding may be. it is great to think “I am the only person who knows this” and then you will have the fun of thinking what this finding will【C6】______and of deciding what will be the【C7】______experiment.

One of the best things about scientific research is that you are always doing something different and it is, never【C8】______.There are good times when things go well and bad times when they【C9】______ . Some people get discouraged at the difficult times. but when I have a failure my policy has always been not to worry but to start planning the next experiment,【C10】______is always fun.

【C1】

A．recognition

B．acknowledgement

C．realization

D．assessment

properly. So when you try, you can run into trouble. Many people【C2】______that when specific muscles are exercised, the fat in the neighbouring area is"【C3】______up". Yet the truth is that exercise burns fat【C4】______all over【C5】______. Studies show muscles which are not【C6】______lose their strength very quickly. To regain it needs 48 to 72 hours and exercise every other day will【C7】______a normal level of physical strength. To【C8】______weight you should always "work up a good sweat" when exercising.【C9】______sweating only【C10】______body temperature to prevent over heating. This is【C11】______water loss.【C12】______You replace the liquid, you【C13】______the weight. Walking is the best and easy-to-do exercise. It helps the circulation of blood【C14】______the body, and has a direct【C15】______on your overall feeling of health. Experience【C16】______that 20 minutes' exercise【C17】______is minimum amount.【C18】______your breathing doesn't return to normal state within minutes after you finish【C19】______, you've done【C20】______.

【C1】

A．much

B．many

C．few

D．little

At around age of five, every child has to make the【C1】______from home to school. Children

at this age have an enormous amount to【C2】______Their response to rules, regulations and manners-all【C3】______related to boundaries — is【C4】______great importance. How they react to "no" will have a major【C5】______on their capacity to settle, to make friends and to learn at school.

After they start school, children are【C6】______with rules. There is both a need and a reluctance to【C7】______them. Children will ask constantly "Am I allowed to… ？", often to the【C8】______of their parents, who feel that they ought to know【C9】______that, for instance, they do not need to ask to go to the toilet at home. It is【C10】______they ask because they need to feel that they have permission, that they are【C11】______a rule. It is a request for【C12】______It is also a way of managing the two different【C13】______of home and school,【C14】______what they can do where. Many a mother gets called by the teacher's name and vice versa.

During the school day, children have to listen to their teachers, to follow more rules than there are at home and to【C15】______with the group. They may be successful at this and come home【C16】______very independent and rightly proud of their【C17】______. If this is not recognised at home and they are treated【C18】______they were before, they will feel as if their "growing up", still very precarious(不稳定的), is diminished. So they will often【C19】______. "Don't treat me like a baby" is a【C20】______frequently heard in the primary school years.

【C1】

A．transfer

B．transition

C．transmission

D．transformation

am a tailor, it will net be【C1】______convenient for me always to have to exchange the clothes I make for other goods or services. A doctor may went to buy a coat from me, but I may not need medical【C2】______so he will then have to find【C3】______else that I want, or look for another tailor who needs him.【C4】______money, the tax-collector would come back to his office with au extraordinary collection of【C5】______.

Considered as a【C6】______of storing up buying power, money has good and bad points. It can more【C7】______be kept a long time【C8】______such things as food, which rots, or buildings, which slowly【C9】______to pieces, or machines, which rust. It takes up very little【C10】______, and if you put it in a bank, it is as【C11】______as anything in this world can be.

But modern money has some very【C12】______disadvantages as a means of storing up buying【C13】______. In the old days, when money was in the【C14】______of geld and silver coins, the metal in each was really【C15】______the amount stamped on the coin. But the paper in modem paper money and even the metal in most modem coins are worth less than the【C16】______written on them.【C17】______, the buying power of modem money can change very greatly【C18】______a short time.

It has happened more than once this century that the buying power of a country's money has fallen to almost【C19】______in a few weeks,【C20】______many thousands of people with savings.

【C1】

A．in mm

B．by chance

C．at all

D．on average