单选题John"s mindless exterior concealed a warm and kindhearted nature.

单选题---It's Sunday tomorrow. What are you going to do?---I （） go hiking, but I'm not sure.

单选题All our efforts to save her did not ______ anything.

单选题1. Not only does asking questions at a meeting involve you in discussions, it is also a good way to demonstrate your professional knowledge.

单选题As a matter of rule, the scrap value of a vessel can hardly be at ______ with the sound value. A. bearish B. par C. collapse D. rally

单选题Which of the following best describes the author's attitude toward the increasing amount of carbon dioxide in the atmosphere and its consequences?

单选题If only ______ the violin in the middle of the night, she'd be an ideal guest.

单选题Secretary: Good morning, Dr. Porter's office. Mr. Long: Good morning. I have an appointment with Dr. Porter at ten-thirty. I'm running a little late. ______?

单选题Most of the young people hold the mistaken belief that goods produced in our own country are ______ to imported ones. A. inadequate B. inappropriate C. inferior D. interior

单选题The Second World War, ______ the earlier one of 1914, prompted public concern about the physical and intellectual well-being of the country"s human resources.

单选题These apple trees,___________I planted three years ago, have not borne any fruit.

单选题I must tell you how ______ a letter from you.

单选题The Nobel Prizes are awards that are given each year for special things that people or groups ofpeople have achieved. They are awarded in six 21__________ : physics, chemistry, medicine, literature,pe

单选题Vicky has been sad recently, for her plan to go to college ______ at the last moment.

单选题 When global warming finally came, it stuck with a vengeance(报复). In some regions, temperatures rose several degrees in less than a century. Sea levels shot up nearly 400 feet, flooding coastal settlements and forcing people to migrate inland. Deserts spread throughout the world as vegetation shifted drastically in North America, Europe and Asia. After driving many of the animals around them to near extinction, people were forced to abandon their old way of life for a radically new survival strategy that resulted in widespread starvation and disease. The adaptation was farming: the global warming crisis that gave rise to it happened more than 10, 000 years ago. As environmentalists convene in Rio de Janeiro this week to ponder the global climate of the future, earth scientists are in the midst of a revolution in understanding how climate has changed in the past, and how those changes have transformed human existence. Researchers have begun to piece together an illuminating picture of the powerful geological and astronomical forces that have combined to change the planet's environment from hot to cold, wet to dry and back again over a time period stretching back hundreds of millions of years. Most important, scientists are beginning to realize that the climatic changes have had a major impact on the evolution of the human species. New research now suggests that climate shifts have played a key role in nearly every significant turning point in human evolution: from the dawn of primates (灵长目动物) some 65 million years ago to human ancestors rising up to walk on two legs, from the huge expansion of the human brain to the rise of agriculture. Indeed, the human history has not been merely touched by global climate change, some scientists argue, it has in some instances been driven by it. The new research has profound implications for the environmental summit in Rio. Among other things, the findings demonstrate that dramatic climate change is nothing new for planet Earth. The benign(宜人的) global environment that has existed over the past 10, 000 years—during which agriculture, writing, cities and most other features of civilization appeared—is a mere bright spot in a much larger pattern of widely varying climate over the ages. In fact, the pattern of climate change in the past reveals that Earth's climate will almost certainly go through dramatic changes in the future—even without the influence of human activity.

单选题The boss felt suspicious about the truth of the account, therefore, he determined to get down to having a good check.

单选题As the story proceeds, March begins to feel under the spell of______.

单选题When the ship was caught in a strong storm at the sea, the captain ______ a danger signal.

单选题Don't believe all of the stereotypes (模式化的形象) you may have heard about Americans. Even the ones that are true in general may not be true about specific individuals or a large part of the population. For example, although Americans tend to be louder than people from other cultures(especially at athletic events), many of the people you meet will be quiet and polite. Some people may be intolerant, but most will be pleasant and welcoming. Remember that American films and television exaggerate(夸张)in order to generate excitement, and so present a rather false picture of what life in the United States is really like. Therefore, tourists in the US are not always on their best behavior. Americans do tend to be more informal than people from other countries. It is common for Americans to wear casual clothing to school and to greet professors by first name. However, good manners and politeness are always appreciated. If you are polite, and dress a little more formally than your American friends, it will not be poorly thought of. However, some businesses require their employees to wear a uniform or a suit. It would be improper to wear a T-shirt and blue jeans to a job interview. Some of the more prestigious restaurants require a coat and tie. Americans tend to dress up for cultural events(the opera, theater and ballet)and to dress down for athletic events. Formal wear is required at weddings and funerals, or any other event with religious event. If you rely on the stereotypes, you will likely put yourself into an embarrassing situation

单选题Woman: Mr. Scott came back from L. A. very late yesterday. Man: So, even if he had been able to attend the party, he would have arrived late. Question: What do we learn about Mr. Scott?