2022雅思閱讀模擬試題

1、 雅思閱讀模擬試題(1)When was the last time you saw a frog? Chances are, if you live in a city, you have not seen one for some time. Even in wet areas once teeming with frogs and toads, it is BEComing less and less easy to find those slimy, hopping and sometimes poisonous members of the animal kingdom. All o

2、ver the world, and even in remote parts of Australia, frogs are losing the ecological battle for survival, and biologists are at a loss to explain their demise. Are amphibians simply oversensitive to changes in the ecosystem? Could it be that their rapid decline in numbers is signaling some coming e

3、nvironmental disaster for us all?This frightening scenario is in part the consequence of a dramatic increase over the last quarter century in the development of once natural areas of wet marshland; home not only to frogs but to all manner of wildlife. However, as yet, there are no obvious reasons wh

4、y certain frog species are disappearing from rainforests in Australia that have barely been touched by human hand. The mystery is unsettling to say the least, for it is known that amphibian species are extremely sensitive to environmental variations in temperature and moisture levels. The danger is

5、that planet Earth might not only lose a vital link in the ecological food chain (frogs keep populations of otherwise pestilent insects at manageable levels), but we might be increasing our output of air pollutants to levels that may have already become irreversible. Frogs could be inadvertently warn

6、ing us of a catastrophe. An example of a species of frog that, at far as is known, has become extinct, is the platypus frog. Like the well-known Australian mammal it was named after, it exhibited some very strange behaviour; instead of giving birth to tadpoles in the water, it raised its young withi

7、n its stomach. The baby frogs were actually born from out of their mothers mouth. Discovered in 1981, less than ten years later the frog had completely vanished from the crystal clear waters of Booloumba Creek near Queenslands Sunshine Coast. Unfortunately, this freak of nature is not the only frog

8、species to have been lost in Australia. Since the 1970s, no less than eight others have suffered the same fate. One theory that seems to fit the facts concerns the depletion of the ozone layer, a well documented phenomenon which has led to a sharp increase in ultraviolet radiation levels.The ozone l

9、ayer is meant to shield the Earth from UV rays, but increased radiation may be having a GREater effect upon frog populations than previously believed. Another theory is that worldwide temperature increases are upsetting the breeding cycles of frogs. TRUE/FALSE/NOT GIVEN 1.Frogs are disappearing only

10、 from city areas. 2.Frogs and toads are usually poisonous. 3.Biologists are unable to explain why frogs are dying. 4.The frogs natural habitat is becoming more and more developed. 5.Attempts are being made to halt the development of wet marshland. 6.Frogs are important in the ecosystem because they

11、control pests. 7.The platypus frog became extinct by 1991. 8.Frogs usually give birth to their young in an underwater nest. 9.Eight frog species have become extinct so far in Australia. 10.There is convincing evidence that the ozone layer is being depleted.11.It is a fact that frogs breeding cycles

12、are upset by worldwide in creases in temperature.Answer Keys：1.F 2.F 3.T 4.T 5.NG 6.T 7.T 8.NG 9.F 10.T 11.F 雅思閱讀模擬試題(2)Almost everyone with or without a computer is aware of the latest technological revolution destined to change forever the way in which humans communicate, namely, the Information S

13、uperhighway, best exemplified by the ubiquitous Internet. Already, millions of people around the world are linked by computer simply by having a modem and an address on the Net, in much the same way that owning a telephone links us to almost anyone who pays a phone bill. In fact, since the computer

14、connections are made via the phone line, the Internet can be envisaged as a network of visual telephone links. It remains to seen in which direction the Information Superhighway is headed, but many believeit is the educational hope of the future. The World Wide Web, an enormous collection of Interne

15、t addresses or sites, all of which can be accessed for information, has been mainly responsible for the increase in interest in the Internet in the 1990s. Before the World Wide Web, the Net was comparable to an integrated collection of computerized typewriters, but the introduction of the Web in 199

16、0 allowed not only text links to be made but also graphs, images and even video. A Web site consists of a home page, the first screen of a particular site on the computer to which you are connected, from where access can be had to other subject related pages(or screens) at the site and on thousands

17、of other computers all over the world. This is achieved by a process called hypertext. By clicking with a mouse device on various parts of the screen, a person connected to the Net can go traveling, or surfing through a of the screen, a person connected to the Net can go traveling, or surfing throug

18、h a web of pages to locate whatever information is required. Anyone can set up a site; promoting your club, your institution, your companys products or simply yourself, is what the Web and the Internet is all about. And what is more, information on the Internet is not owned or controlled by any one

19、organization. It is, perhaps, true to say that no one and therefore everyone owns the Net. BECause of the relative freedom of access to information, the Internet has often been criticised by the media as a potentially hazardous tool in the hands of young computer users. This perception has proved to

20、 be largely false however, and the vast majority of users both young and old get connected with the Internet for the dual purposes for which it was intended - discovery and delight. TRUE/FALSE/NOT GIVEN 1.Everyone is aware of the Information Superhighway. 2.Using the Internet costs the owner of a te

21、lephone extra money. 3.Internet computer connections are made by using telephone lines. 4.The World Wide Web is a network of computerised typewriters. 5.According to the author, the Information Superhighway may be the future hope of education. 6.The process calledhypertextrequires the use of a mouse

22、 device. 7.The Internet was created in the 1990s. 8.The home pageis the first screen of a Website on the Net. 9.The media has often criticised the Internet because it is dangerous. 10. The latest technological revolution will change the way humans communicate. 1.F 2.NG 3.T 4.F 5.T 6.T 7.F 8.T 9.F 10

23、.T雅思閱讀模擬試題(3)1. The failure of a high-profile cholesterol drug has thrown a spotlight on the complicated machinery that regulates cholesterol levels. But many researchers remain confident that drugs to boost levels of good cholesterol are still one of the most promising means to combat spiralling he

24、art disease. 2. Drug company Pfizer announced on 2 December that it was cancelling all clinical trials of torcetrapib， a drug designed to raise heart-protective high-density lipoproteins (HDLs)。 In a trial of 15000 patients， a safety board found that more people died or suffered cardiovascular probl

25、ems after taking the drug plus a cholesterol-lowering statin than those in a control group who took the statin alone. 3. The news came as a kick in the teeth to many cardiologists because earlier tests in animals and people suggested it would lower rates of cardiovascular disease. “There have been n

26、o red flags to my knowledge，” says John Chapman， a specialist in lipoproteins and atherosclerosis at the National Institute for Health and Medical Research (INSERM) in Paris who has also studied torcetrapib. “This cancellation came as a complete shock.” 4. Torcetrapib is one of the most advanced of

27、a new breed of drugs designed to raise levels of HDLs， which ferry cholesterol out of artery-clogging plaques to the liver for removal from the body. Specifically， torcetrapib blocks a protein called cholesterol ester transfer protein (CETP)， which normally transfers the cholesterol from high-densit

28、y lipoproteins to low density， plaque-promoting ones. Statins， in contrast， mainly work by lowering the bad low-density lipoproteins. Under pressure 5. Researchers are now trying to work out why and how the drug backfired， something that will not become clear until the clinical details are released

29、by Pfizer. One hint lies in evidence from earlier trials that it slightly raises blood pressure in some patients. It was thought that this mild problem would be offset by the heart benefits of the drug. But it is possible that it actually proved fatal in some patients who already suffered high blood

30、 pressure. If blood pressure is the explanation， it would actually be good news for drug developers because it suggests that the problems are specific to this compound. Other prototype drugs that are being developed to block CETP work in a slightly different way and might not suffer the same downfal

31、l. 6. But it is also possible that the whole idea of blocking CETP is flawed， says Moti Kashyap， who directs atherosclerosis research at the VA Medical Center in Long Beach， California. When HDLs excrete cholesterol in the liver， they actually rely on LDLs for part of this process. So inhibiting CET

32、P， which prevents the transfer of cholesterol from HDL to LDL， might actually cause an abnormal and irreversible accumulation of cholesterol in the body. “Youre blocking a physiologic mechanism to eliminate cholesterol and effectively constipating the pathway，” says Kashyap. Going up 7. Most researc

33、hers remain confident that elevating high density lipoproteins levels by one means or another is one of the best routes for helping heart disease patients. But HDLs are complex and not entirely understood. One approved drug， called niacin， is known to both raise HDL and reduce cardiovascular risk bu

34、t also causes an unpleasant sensation of heat and tingling. Researchers are exploring whether they can bypass this side effect and whether niacin can lower disease risk more than statins alone. Scientists are also working on several other means to bump up high-density lipoproteins by， for example， i

35、ntroducing synthetic HDLs. “The only thing we know is dead in the water is torcetrapib， not the whole idea of raising HDL，” says Michael Miller， director of preventive cardiology at the University of Maryland Medical Center， Baltimore. Questions 1-7 This passage has 7 paragraphs 1-7. Choose the corr

36、ect heading for each paragraph from the list of headings below. Write the correct number i-ix in boxes 1-7 on your answer sheet. List of Headings i. How does torcetrapib work? ii. Contradictory result prior to the current trial iii. One failure may possibly bring about future success iv. The failure

37、 doesnt lead to total loss of confidence v. It is the right route to follow vi. Why its stopped vii. They may combine and theoretically produce ideal result viii. Whats wrong with the drug ix. It might be wrong at the first place Questions 7-13 Match torcetrapib，HDLs，statin and CETP with their functions (Questions 8-13)。 Write the correct letter A， B， C or D in boxes 8-13 on your answer sheet. NB You may use any letter more than once. 7.It has been administered to over 10，000 subjects in a clinical trial. 8.