单选题All the books, ______ had some pictures in them, were sent to the little girl. A. which B. that C. who D. whose

单选题In the days when coal was so (widely) used, (no one) realized how soon and how (complete) oil would replace (it).

单选题Another thing an astronaut has to learn about is eating in space. Food is weightless, just as men are. Food for space has to be packed in special ways. Some of it goes into tubes that a man can squeeze into his mouth. Bite-sized cookies are packed in plastic. There is a good reason for covering each bite. The plastic keeps pieces of food from travelling in the spaceship. On the earth very small pieces of food would simply fall to the floor. But gravity doesn"t pull them to the floor when they are out of the plastic in a spaceship. They move here and there and can get into a man"s eyes or into the spaceship"s instruments. If any of the instruments is blocked, the astronauts may have trouble getting safely home. As astronauts travel on longer space trips, he must take time to sleep. An astronaut can fit himself to his seat with a kind of seat belt. Or, if he wants to, he can sleep in a sleeping bag which is fixed in place under his seat. But be careful he must put his hands under the belt when he goes to sleep. This is because he is really afraid that he might touch one of controls that isn"t supposed to be touched until later.

单选题{{B}}Passage 3{{/B}} "High tech" and "state of the art" are two expressions that describe the modern technology. High tech is just a shorter way of saying high technology. And high technology describes any invention, system of device that uses the newest ideas or discoveries of science and engineering. What is high tech? A computer is high tech. So is a communications satellite. (79) {{U}}A modern manufacturing (生产) system is surely high tech. High tech became a popular expression in the united States during the early 1980's. {{/U}}Because of improvements in technology, people could buy many new kinds of products in American stores, such as home computers, microwave ovens, etc. "State of the art" is something that is as modern as possible. It is a product that is based on the very latest methods and technology. Something that is "state of the art" is the newest possible design or product of a business or industry. A state of the art television set, for example, uses the modernest electronic design and parts. It is the best that one can buy. "State of the art" is not a new expression. Engineers have used it for years, to describe the best and most modern way of doing something. Millions of Americans began to use the expression in the late 1970's. The reason was the computer revolution. Every computer company claimed that its computers were "state of the art". Computer technology changed so fast that a state of the art computer today might be old tomorrow. (80) {{U}}The expression "state of the art" became as common and popular as computers themselves. {{/U}}Now all kinds of products are said to be "state of the art".

单选题Shop assistant: Good morning. Can I help you? Customer: ______. I"m just looking around.

单选题Speaker A: ______, Susan? Speaker B: I have written and rewritten so much that I don't know if I'll ever get it finished. A. How are you doing B. How are you getting along with your work C. How are you getting along with your lessons D. How are you getting along with your term paper

单选题Scientists believe that color blindness is a(n) ____ defect, and there is no cure for it.

单选题Wife: I love the blue one, but we' re running out of money these days. Husband: ______We' 11 go cheaper. What about the black one?

单选题—John, where are the cookies? Don't tell me you ate them all. Again! —______I couldn't help it. They were so good.

单选题Mr. Smith, who worked as the manager of the company in ______ place of Mr. Johnson, liked to have everything in ______ place.A. the; theB./; /C. the;/D./; the

单选题When Mr. Green retired, his son ______ the business. A. took up B. took on C. took over D. took out

单选题The statement "everything went without a hitch"(Par

单选题The disease spread very quickly, but thanks to the help of the soldiers, all the people ______ were sent to big hospitals.

单选题What are the differences between public and private in American higher education? A big difference involves money. Public colleges and universities charge for an education just like private schools. But state schools cost less because they get money from the states that started them to educate local citizens. As a result, out-of-state and international students usually pay more than state residents, at least the first year. The state with the most residents, almost forty million, is California. Its systems of two-year and four-year colleges and universities are among the largest in the world. But the example we are going to focus on today is to the north of California, in a much smaller state on the West Coast: Oregon. The University of Oregon, located in Eugene, is one of the campuses in the Oregon University System. The cost for undergraduates this year is $6,000 for state residents. Housing is an additional $8,000. Non-residents pay the same for housing--but almost $20,000 for tuition and fees. Let's see how these numbers compare to a private college in Oregon. Lewis and Clark College in Portland has 4,000 students, compared to 20,000 at the University of Oregon. Housing costs $800 more than at the state school. But the big difference is tuition. The published price at Lewis and Clark is almost $34,000. Yet Lewis and Clark is one of the few American colleges to offer financial aid for international students. Each year it awards financial aid to twenty students from other countries. And it says the average award last year was 19,000 dollars. That would make Lewis and Clark cheaper for international students than the University of Oregon. But, of course, prices alone do not say anything about the quality of a school or the value of an education.

单选题The coal output last year was ______ five years before.

单选题Americans are more socially isolated than they were 20 years ago, separated by work, commuting and the single life, researchers reported. Nearly a quarter of people surveyed said they had "zero" close friends with whom to discuss personal matters. More than 50 percent named two or fewer close friends, the researchers said. "This is a big social change, and it indicates something that's not good for our society," said Duke University Professor Lynn Smith-Lovin. Smith-Lovin's group used data from a national survey of 1,500 American adults that has been ongoing since 1972. She said it indicated people had a surprising drop in the number of close friends since 1985. At that time, Americans most commonly said they had three close friends whom they had known for a long time, saw often, and with whom they shared a number of interests. They were almost as likely to name four or five friends, and the relationships often sprang from their neighborhoods or communities. Ties to a close network of friends create a social safety net that is good for society. Research has also linked social support and civic participation to a longer life, Smith-Lovin said. The data also show the social isolation trend mirrors other class divides: Non-whites and people with less education tend to have smaller social networks than white Americans and the highly educated. That means that in daily life, personal emergencies and national disasters such as Hurricane Katrina, those with the fewest resources also have the fewest personal friends to call for advice and assistance. "It's one thing to know someone and exchange e-mails with them. It's another thing to say, 'Will you give me a ride out of town with all of my possessions and pets? And can I stay with you for a couple or three months?'" Smith-Lovin said. "Worrying about social isolation is not a matter of remembering a warm past. Real things are strongly connected with that," added Harvard University Public Policy Professor Robert Putnam. He suggested flexible work schedules would allow Americans to tend both personal and professional lives.

单选题According to the U. S. National Highway Traffic Safety Administration (NHTSA), car crashes are the leading cause of death among children (51) 5 and 14 years of age. Says NHTSA: "Over 50% of children who die in crashes are (52) by safety devices. (53) , 4 out of 5 children are improperly restrained." The NHTSA offers a number of safety tips and (54) for those who are accompanied by children while driving. Although laws (55) from country to country and even from state to state, these guidelines may (56) food for thought to many parents and guardians of children. Please check your local laws and do (57) you can to keep your precious baby safe. The safest place for all children is in the back seat. Infants should be (58) in a rear facing safety seat in the backseat of the car. A child at least a year old and (59) at least 20 pounds may be placed in a forward-facing seat. At 40 pounds, the child can use a "booster seat", which is secured by one of the car's lap and shoulder (60) . At approximately 80 pounds and a height of about four feet nine inches, the child may begin using an adult safety belt.