单选题The attack of the World Trade Center will leave a ______ impression on those who have witnessed the explosion.

单选题 The international situation has been growing ______ difficult for the last few years.

单选题Most teenagers in the United States try to make time for school , family and friends． But some choose bigger goals． Here are the stories of two American teens working to make a difference in the world

单选题 A. forecast B. flexible C. neutrally D. preference E. detach F. bound G. implement H. consequence I. qualified J. dismissing K. result L. occupying M. urgently N. skeptical O. response In the second half of the twentieth century, many countries of the South began to send students to the industrialized countries for further education. They 42 needed supplies of highly trained personnel to 43 a concept of development based on modernization. But many of these students decided to stay on in the developed countries when they had finished their training. In the 1960s, some Latin American countries tried to solve this problem by setting up special 'return' programs to encourage their professionals to come back home. These programs received support from international bodies such as the International Organization for Migration, which in 1974 enabled over 1, 600 44 scientists and technicians to return to Latin America. In the 1980s and 1990s, 'temporary return' programs were set up in order to make the best use of trained personnel 45 strategic positions in the developed countries. This gave rise to the United Nations Development Program's Transfer of Knowledge through Expatriate Nationals, which encourages technicians and scientists to work in their own countries for short periods. But the brain drain from these countries may well increase in 46 to the new laws of the international market in knowledge. Recent studies 47 that the most developed countries are going to need more and more highly qualified professionals around twice as many as their educational systems will be able to produce, or so it is thought. As a 48 there is an urgent need for developing countries which send students abroad to give 49 to fields where they need competent people to give muscle to their own institutions, instead of encouraging the training of people who may not come back because there are no professional outlets for them. And the countries of the South must not be content with institutional structures that simply take back professionals sent abroad; they must introduce 50 administrative procedures to encourage them to return. If they do not do this, the brain drain is 51 to continue.

单选题Ever since she was a little girl, she ______ interested in music.

单选题Children who are overprotected by their parents may become ______.

单选题The full ______ of changes in computer technology will be felt within the next few years. A. affect B. impact C. action D. importance

单选题I’ll lend you my computer ______ you promise to take care of it.

单选题It is always useful to have savings to ______.

单选题What you're ______ to read may challenge your assumptions about the kind of world we live in. A. around B. ahead C. above D. about

单选题When I saw the expression on his face, I realized he is ______ agreement with me.

单选题Scientists are searching for the oldest tree __________ because it can teach them a great deal about many issues related with climate change.

单选题Born of the same parents, he bears no ______ his brothers.

单选题This is a ______ table.

单选题The course normally attracts 20 students per year, ______ up to half will be from overseas. A. in which B. for whom C. with which D. of whom

单选题A big problem in learning English as a foreign language is a lack of opportunities for ______ interaction with proficient speakers of English.

单选题How does labor usually behave?

单选题 A．doubt B．active C．system D．offer E．unfairly F．unfortunately G．motive H．assert I．peace J．demand K．ask L．superior M．overcome N．confidence O．roar Have you ever been afraid to talk back when you were treated 42 Have you ever bought something just because the salesman talked you into it? Are you afraid to ask someone for a date? Many people are afraid to assert themselves. Dr. Alberti thinks it's because their self-respect is low. 'Our whole 43 is designed to make people distrust themselves,' says Alberti. 'There's always ' 44 ' around—a parent, a teacher, a boss—who 'knows better'. These superiors often gain when they chip away at your self-image.' But Alberti and other scientists are doing something to help people 45 themselves, They 46 'assertiveness training' courses—AT for short. In the AT courses people learn that they have a right to be themselves. They learn to speak out and feel good about doing so. They learn to be more 47 without hurting other people. In one way, learning to speak out is to 48 fear. A group taking a course will help the timid person to lose his fear. But AT uses an even stronger 49 —the need to share. The timid person speaks out in the group because he wants to tell how he feels. Whether or not you speak up for yourself depends on your self-image. lf someone you face is more 'important' than you, you may feel less of a person. You start to 50 your own good sense. You go by the other person's 51 . But, why should you? AT says you can get to feel good about yourself. And once you do, you can learn to speak out.

单选题The manager is calling on a ______ customer trying to talk him into signing the contract. A. prosperous B. preliminary C. pessimistic D. prospective