What happened in that country can easily upset the ______ balance of power in that area.

If we had known she had planned to go abroad today, we______at the airport.

______at Harvard, he began to write his essay.

This year' s awards include a new______: for companies with bright ideas on recycling waste.

The question is______to send troops to take Part in the war.

That student ______his hand every time I asked a question.

A youngster's social development has a profound effect on his academic progress. Kids who have trouble getting along with their classmates can end up behind academically as well and have a higher chance of dropping out(退学). In the early grades especially, experts say, youngsters should be encouraged to work in groups rather than individually so that teachers can spot children who may be having problems making friends. "When children work on a project", says Lillian Kate, an educational professor at the University of Illinois, "they learn to work together, to disagree, to think, to take turns and lighten tensions. These skills can't be learned through lecture. We all know people who have wonderful technical skills but don't have any social skills. Relationships should be the first ". At a certain age, children are also learning to judge themselves in relation to others. For most children, school marks the first time that their goals are not set by an internal clock but by the outside world. Just as the 1-year-old struggling to walk the 6-year-old is struggling to meet adult expectations. If they try hard to do something and fail, they may conclude that they will never be able to accomplish a particular task. "The effects of obvious methods of comparison such as posting grades can be serious ", says Hills, "a child who has had his confidence really damaged needs a rescue operation".

Compared to everyday English, the language used in scientific______is usually more formal.

The teacher had the naughty boy______for about an hour at the back of the classroom.

Crime has its own cycles, a magazine reported some years ago. Police records that were studied for five years from over 2400 cities and towns show a surprising link between changes in the season and crime patterns in UK. The pattern of crime has varied very little over a long period of years. Murder reaches its high during July and August, as do rape and other violent attacks. Murder, moreover, is more than seasonal: it is a weekend crime. It is also a nighttime crime: 62 percent of murders are committed between 6p. m. and 6a. m. Unlike the summer high in crimes of bodily harm, burglary has a different cycle. You are most likely to be robbed between 6p. m. and 2a. m. on a Saturday night in December, January or February. The most uncriminal month of all is May: however, more dog bites are reported in this month than in any other month of the year. On the one hand, our intellectual seasonal cycles are completely different from our criminal tendencies. Professor Huntington, of the Foundation for the Study of Cycles, made extensive studies to discover the seasons when people read serious books, attend scientific meetings, make the highest scores on examinations, and propose the most changes to patents. In all instances, he found a spring peak and an autumn peak separated by a summer low. On the other hand, Professor Huntington's studies indicated that June is the peak month for suicides and admissions to mental hospitals. June is also a peak month for marriages!

What do we mean by a satisfactory standard of living? Obviously, it must include the basic necessities of life such as food, clothing and shelter. To get these necessities on regular basis, a person must have a reliable income. But we have other needs which would probably also be included as basic, such as health and education facilities. We may think of all of these as our needs. Yet most of us would be far from satisfiedif we had nothing more than these which are supplied for us. We all enjoy extra income to spend on things like books, sports or hobbies. Sometimes we save some of this extra income to pay for future expense of this type on holidays. So we must add our wants to our basic needs. Our standard of living is the degree, to which these needs and wants are satisfied. But as time goes on, what we think of as our basic needs changes. Twenty years ago a television would have been a luxury, and still is in manycountries now, Even now we cannot say it is a need in the same sense as food, clothing and shelter. Yet if most of the people of a country have one, it comes to be accepted as a need. It is possible therefore to have food, clothing and shelter and still be poor by the standards of our own society.

Climate change will greatly______wheat and rice production if nations don't take steps now.

When the little child caught sight of the young woman ______ in white he started quarrelling immediately.

There are five factories in this region, _____ over 100 workers.

Sports and games make our bodies strong, prevent us from getting too fat, and keep us healthy. But these are not their only use. They give us valuable practice in making eyes, brain and muscles work together. In tennis, our eyes see the ball coming, judge its speed and direction and pass this information on to the brain. The brain then has to decide what to do, and to send its orders to the muscles of the arms, legs, and so on, so that the ball is met and hit back where it ought to go. All this must happen with very great speed, and only those who have had a lot of practice at tennis can carry out this complicated chain of events successfully. For those who work with their brains most of the day, the practice of such skills is especially useful. Sports and games are also very useful for character-training. In their lessons at school, boys and girls may learn about such virtues as unselfishness, courage, discipline and love of one's country: but what is learned in books cannot have the same deep effect on a child's character as what is learned by experience. The ordinary day-school cannot give much practical training in living, because most of the pupils' time is spent in classes, studying lessons. So it is what the pupils do in their spare time that really prepares them to take their place in society as citizens when they grow up. If each of them learns to work for his team and not for himself on the football field, he will later find it natural to work for the good of his country instead of only for his own benefit.

All my neighbors tried to help in some way. But they turned out to be actually( )the way.

You'd better go there by train. The plane ticket is______the train ticket.

Let me give you a______ of how the computer works.

Have you ever visited the Summer Palace,_____there are many beautiful halls, ridges and a huge lake?