Can trees talk? Yes, but not in words. Scientists have reason to believe that trees do communicate (交际) with each other. Not long ago, researchers learned some surprising things. First a willow tree attacked in the woods by caterpillars (毛虫) changed the chemistry of its leaves and made them taste so terrible that they got tired of the leaves and stopped eating them. Then even more astonishing, the tree sent out a special smell a signal (信号) causing its neighbors to change the chemistry of their own leaves and make them less tasty. Communiurse, doesn't need to be in words. We can talk to each other by smiling, raising our shoulders and moving our hands. We know that birds and animals use a whole vocabulary of songs, sounds, and movements. Bees dance their signals, flying in certain patterns that tell other bees where to find nectar (花蜜) for honey. So why shouldn't trees have ways of sending message?1. It can be concluded from the passage that caterpillars do not feed on leaves that ______.A．are lying on the groundB．have an unpleasant tasteC．bees don't likeD．have an unfamiliar shape2. The willow tree described in the passage protected itself by ______.A．growing more branchesB．communicating with birds and beesC．changing its leaf chemistryD．shaking caterpillars off3. According to the passage, the willow tree was able to communicate with other trees by ______.A．waving its branchesB．giving off a special smellC．dropping its leavesD．changing the colour of its trunk4. According to this passage, bees communicate by ______.A．making special movementB．Telling one anotherC．smelling one anotherD．making unusual sound5. The author believes that the incident described in the passage ________．A．cannot be taken seriouslyB．should no longer be permittedC．must be checked more thoroughlyD．seems completely reasonable

—Diana, do you eat apple every day?一 ____ A. No, sometimes I'd have a boiled egg. B. I always eat it because it's spicy. C. Porridge is Andy's favorite.

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.This year a foreign undergraduate student in the University of Oregon should pay (). A. an additional 8,000 for the tuition B. as much as the state residents C. less than a state resident if they can get financial aid D. 14,000 more than state residents

Doctor Black is reputed to be the best heart ______ in the country .A. surplusB. surroundC. surgeon

Which of the following best describes the author’s view about the food we eat?A．Unclear.B．Indifferent.C．Optimistic.D．Concerned.Questions 16 to 20 are based on the following passage：Passage Two：It is becoming more and more difficult to be sure that the food we eat is not actually harming us. We seem to get one food scare after another.Several of these, recently, have concerned genetically modified （GM，转基因） foods. Although some experts tell us that these foods will do us no harm and that the concern about them is just speculative, other experts say that GM food is potentially very damaging to health.At the very best, the jury is still out on the matter.In many countries, products which have been genetically modified are supposed to show this information on their labels, but now some of the large food producers are saying that it is growing increasingly difficult to separate GM food from the conventional varieties.Pesticides （杀虫剂） and chemical fertilizers are also a cause of concern. In the last few years, a great many people have started to buy organic produce, although this is much more expensive than that which is grown using conventional methods. They do so in an effort to stop filling their bodies, and those of their children, with poisonous chemicals.Thus there is an increased demand for organic food and this is not a temporary fashion. But some experts claim that organically grown food is no healthier than other food, because the poison level of the latter is not so high as to be harmful. Those who push for organic food may not be objective, but are part of the powerful food lobby, the chief concern of which is to increase organic food production with a corresponding increase in profits.The use of additives （添加剂） is still another source of anxiety to consumers. These are often added to food to supposedly improve the colour or the flavour. However, it is thought that some of these may be the cause of allergies （过敏）, or even the cause of behavioural problems in children.We have to eat to live. The problem is: what is safe to eat?

A successful ________ project, a report showing that fewer oysters are dying from disease, and the growth of oyster farming all give cause for optimism.A. decorationB. restorationC. frustrationD. registration

Sometimes, members of teams_obstacles by focusing solely on their own pursuits and goals.A. createB. createsC. creating

What was considered impolite years ago has become ________ now.A. accessibleB. adjustableC. unbelievableD. acceptable

We would rather drink than ( ) at parties.to eat eat eating ate

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