单选题The research shows that nearly 130 species of birds are vulnerable to the predicted effects of climate change.

单选题I have ______ interesting books on natural science. A. much B. a lot C. many a great D. a great many of

单选题In the Han Dynasty, the royal government sent special envoys to the western countries to disseminate the Chinese culture.

单选题You've now heard it so many times, you can probably repeat it in your sleep. President Obama will no doubt make the point publicly when he gets to Beijing: the Chinese need to consume more; they need—believe it or not—to become more like Americans, for the sake of the global economy. And it's all true. But the other side of that equation is that the U. S. needs to save more. For the moment, American households actually are doing so. After the personal-savings rate dipped to zero in 2005, the shock of the economic crisis last year prompted people to snap shut their wallets. In China, the household-savings rate exceeds 20%. As we've seen, wage earners are expected to care for not only their children but their aging parents. And there is, to date, publicly-funded health care and pension systems which increases incentives for individuals to save while they are working. But China is a society that has long esteemed personal financial prudence (谨慎). There is no chance that will change anytime soon, even if the government creates a better social safety net and successfully encourages greater consumer spending. Why does the U. S. need to learn a little frugality (节俭)? Because healthy savings rates are one of the surest indicators of a country's long- term financial health. High savings lead, over time, to increased investment, which in turn generates productivity gains, innovation and job growth. In short, savings are the seed corn of a good economic harvest. The U. S. government thus needs to act as well. By running constant deficits, it is dis-saving, even as households save more. Peter Orszag, Obama's Budget Director, recently called the U. S. budget deficits unsustainable and he's right. To date, the U. S. has seemed unable to see the consequences of spending so much more than is taken in. That needs to change. That's what happens when you're the world's biggest creditor: you get to drop hints like that, which would be enough by themselves to create international economic chaos if they were ever leaked. (Every time any official in Beijing deliberates publicly about seeking an alternative to the U. S. dollar for the $2.1 trillion China holds in reserve, currency traders have a heart attack.) If Americans saved more and spent less, consistently over time, they wouldn't have to worry about all that.

单选题______ we arrived in a more urban area: where Jim took me to a place called Boston Market. A. Before long B. After long C. Shortly before D. Shortly after

单选题A new war ______ between the two countries.

单选题 A. p{{U}}ar{{/U}}ticle B. p{{U}}ar{{/U}}tner C. p{{U}}ar{{/U}}tial D. p{{U}}ar{{/U}}ticular

单选题During the opera's most famous aria the tempo chosen by the orchestra's conductor seemed ______, without necessary relation to what had gone before.

单选题It was ______ he was too clumsy to drive a car that Jim hadn't learned to drive. A. as B. for C. because D. because of

单选题Last month, Mars and Earth were at the closest points in their ______ orbits. The distance between the two worlds was 68 million kilometers.

单选题______ the friendship between our two peoples last forever!

单选题He must have been there before, ________?

单选题The city is ______ of three sections, which are separated by rivers. A. upset B. valued C. composed D. ventured

单选题{{B}}Directions:{{/B}} Read the following text. Choose the best word (s) for each numbered blank and mark A, B, C, and D on ANSWER SHEET 1. Selection to participate in a top executive-education program is an important rung on the ladder to top corporate jobs. U. S. corporations {{U}}(1) {{/U}} billions of dollars in this form of management development -- and use it to {{U}}(2) {{/U}} and train fast-track managers. Yet one {{U}}(3) {{/U}} of executive education found that less than 5% of the managers {{U}}(4) {{/U}} to these high-profile programs are women -- and minorities are terribly {{U}}(5) {{/U}} as well. The numbers are {{U}}(6) {{/U}}. In regular business {{U}}(7) {{/U}} usually paid for by the participant, not an employer -- there are plenty of women and minorities. Women, for example, {{U}}(8) {{/U}} for about 30% of MBA candidates. Yet in the {{U}}(9) {{/U}} programs paid for by corporations that round out a manager's credentials at a {{U}}(10) {{/U}} career point, usually at age 40 or 45, companies are making only a {{U}}(11) {{/U}} investment in developing female and minority executives. A case {{U}}(12) {{/U}} point: Only about 30% of the 180 executives in Stanford's recent {{U}}(13) {{/U}} management program were women. Most companies say these days they are {{U}}(14) {{/U}} hiring and promoting women and minorities-- and there are some {{U}}(15) {{/U}} trends in overall employment and pay levels so why are companies {{U}}(16) {{/U}} the ball when it {{U}}(17) {{/U}} executive education? The schools {{U}}(18) {{/U}} that they are neither the cause of nor the cure for the problem. A Harvard Business School dean figures that companies are {{U}}(19) {{/U}} of sending their female executives {{U}}(20) {{/U}} they don't want to lose them to competitors.

单选题Special labor laws protecting women workers tend to