单选题It worried her a bit ______ her hair was turning gray. A. while B. if C. that D. for

单选题Because of the financial crisis, days are gone______local 5-star hotels charged 6,000 Yuan for one night.

单选题According to recent reports, the numbers of ______ in Allenton is expected to double by the year 2010. A. manufacturers B. manufacturing C. manufactured D. manufactures

单选题______ matters most in learning English is enough practice.

单选题He paused, waiting for her to digest the information.

单选题From: Restaurant Management To: All Staff Attention workers: Ally's Seafood House will be closed for an entire week at the beginning of March while our kitchen equipment is updated in accordance with the latest health standards. Specific dates for the closure will be announced as soon as we receive notification from the maintenance company. Unfortunately, hourly workers will be forced to take a week of unpaid leave during the scheduled maintenance, but it will not be subtracted from your allotted vacation days. Time off for salaried workers will be paid. Please direct any questions about the closure to your supervisor or shift manager. Keep up with the hard work!

单选题【2015交通银行】What puzzles me is why his books are so popular．

单选题H Trees should only be pruned (修剪) when there is a good and clear reason for doing so and, fortunately, the number of such reasons is small. Pruning involves cutting away of overgrown and unwanted branches, and the inexperienced gardener can be encouraged by the thought that more damage results from doing it unnecessarily than from leaving the trees to grow in their own ways. First, pruning may be done to make sure that trees have a desired shape or size. The object may be to get a tree of the right height, and at the same time to help the growth of small side branches which will thicken its appearance or give it a special shape. Secondly, pruning may be done to make the tree healthier. You may cut out diseased or dead wood, or branches that are rubbing against each other and thus causing wounds. The health of a tree may be encouraged by removing the branches that are locking up the centre and so preventing the free movement of air. One result of pruning is that an open wound is left on the tree and this provides an easy entry for diseases, but it is a wound that will heal (愈合). Often there is a race between the healing and the disease as to whether the tree will live or die, or that there is a period when the tree is at risk. It should be the aim of every gardener to reduce the risk as far as possible. It is essential to make the area which has been pruned smooth and clean, for healing will be slowed down by roughness. You should allow the cut surface to dry for a few hours and then paint it with one of the substances available from garden shops produced especially for this purpose. Pruning is usually done in winter, for then you can see the shape of the tree clearly without the interference (妨碍) from the leaves and it is, too, very unlikely that the cuts you make will bleed. If this does happen, it is, of course, impossible to paint them properly.

单选题March 3, 2006Asa Mitchell7690 Cardinal Hill #34Melbourne, VictoriaDear Mr. Mitchell, I have the great privilege of inviting you to the sixteenth annual Fight Cancer Foundation(FCF)celebrator dinner and fundraiser on the evening of March 21. We have had tremendous success over the last year in collecting donations and forwarding them to organizations committed【K7】______a cure for cancer. Come help us celebrate that success! This will be a black-tie event, and all of FCF' s board members and executives will be【K8】______. Dinner, drinks, and musical entertainment will be provided. Ordinarily, tickets to this event cost $100 per person. However, as a regular and generous contributor to our worthy cause, you will receive two tickets absolutely【K9】______. All guests will of course have the opportunity to make additional donations at the dinner. We at the Fight Cancer Foundation thank you for your support, and we hope you can join us on March 21st. Sincerely, Valerie Sobetzki

单选题Have you ever wondered what our future is like? Practically，all people【B1】_____ a desire to predict their future 【B2】_____ Most people seem inclined to【B3】_____this task using causal reasoning． First，we【B4】_____recognize that future circumstances are【B5】_____ caused or conditioned by present ones．We learn that getting an education will【B6】_____ how much money we earn later and that swimming beyond the reef may bring an unhappy 【B7】_____with a shark． Second，people also learn that such 【B8】_____ of cause and effect are probabilistic(可能的)in nature．That is，the effects occur more often when the causes occur than when the causes are【B9】_____，but not always．Thus，students learn that studying hard 【B10】_____good grades in most instances，but not every time．Science makes these concepts of causality and probability more 【B11】_____ and provides techniques for dealing 【B12】_____ then more accurately than does causal human inquiry．In looking at ordinary human inquiry，we need to 【B13】_____ between predicting and understanding．Often，even if we don't understand why，we are willing to act【B14】_____the basis of a demonstrated predictive ability． Whatever the primitive drives 【B15】_____motivate human beings，satisfying them depends heavily on the ability to【B16】_____future circumstances．The attempt to predict is often played in a 【B17】_____of knowledge and understanding．If you can understand why certain regular patterns 【B18】_____，you can predict better than if you simply observe those patterns．Thus，human inquiry aims【B19】_____answering both“what”and“why” question，and we pursue these【B20】_____by observing and figuring out．

单选题It"s summer. In the United States, it"s the season of swimming pools, barbeques, camping and road trips. Road trip vacations where the car journey is part of the fun are especially popular with college students, who like to explore the country on wheels. These budget trips are ideal for students who often have plenty of free time but little money. "Ever since I went to college, I"ve been traveling around a lot, exploring the country," said Austin Hawkins, a 19-year-old college student from New York. This summer, Hawkins and his friends have spent weekends traveling in New England. The best part about car trips, said Hawkins, is that you can be spontaneous. "On a road trip, if you get interested in things you see along the way you can stop and explore." Matt Roberts, a 20-year-old student from Ohio who drove to Montreal, Canada, agrees. "With road trips you don"t have to plan in advance, you can just get into a car and drive." Even with high gas prices, driving with friends is cheaper than flying. Roberts paid about 40 dollars for gas, but a round trip plane ticket would have cost nearly 400 dollars. Driving trips first became popular in the 1920s. Newly paved roads and improved cars made it possible to travel longer distances. Motels started appearing outside cities. By the 1950s, car ownership became the norm. Construction of the US interstate highway system began in 1956 and motel and restaurant chains popped up everywhere making long distance trips easier. Today, the US has the highest car ownership rate in the world. Only 8 percent of American homes have no car, according to the most recent US census. Though many college students don"t own a car, most have access to one. On many of Hawkins" trips, they used a borrowed van. Hawkins" most memorable road trip took place over spring break. He and two friends drove from New York to New Orleans to volunteer, helping rebuild the city after Hurricane Katrina hit it last July. They crossed the country in two days and slept in their car in church parking lots. Roberts" road trip to Canada last winter was even more eventful. Upon arriving in Montreal, they were lost in a blizzard and shivering in the -25° cold. To find their hotel, they turned on a laptop and drove around in circles until they found a spot with wireless Internet coverage. "I know we should have planned better, but we"re young. Now, when I see those guys I always say: "Remember when we were lost in the snow storm!" I"ll never forget that."

单选题This problem may lead to more serious ones if ______ unsolved.A. it is leftB. leftC. it has been leftD. leaving

单选题Ms. McMahon would like to speak with ______ attended the annual accounting seminar in Phoenix last weekend. A. anyone B. however C. everybody D. whoever

单选题He rolled up his trouser leg to {{U}}exhibit{{/U}} his wounded knee. A. spread B. open C. show D. examine

单选题When I came back, I found my bicycle was ______.

单选题To proof-read these piles of documents is very time ______.A. consuming B. spending C. expending D. wasting

单选题The path in the park looked beautiful, ______ with ______ leaves. A. covered; falling B. covered; fallen C. covering; falling D. covering; fallen

单选题______ a sports meet last Sunday? Yes, they ______. A. Did they have; did B. Do they have; have C. Had they; had D. Have they; have

单选题Our new product will be put through a number of ______ tests before being released to the public. A. dependent B. founded C. withhold D. stringent

单选题By ______ a cheaper material for the steel in our products, we can greatly reduce manufacturing costs. A. substituting B. replacing C. alternating D. displacing