小黑雅思用心，出国学习省心！小黑雅思用心，出国学习省心！ 第第 1 页页 共共 4 页页 http:/www.eng86.com关怀热线：400-600-7921 官网： www.eng86.com小黑雅思基础语法练习及答案语法练习语法练习Complete the following sentences by circling the missing words.1.Science still a cure for cancer. a.doesnt find c.hasnt found b.havent foundd.arent finding2.While he a route to the Indies, Columbus discovered America. a.searched c.had searched for b.was discoveringd.was searching for3.Existing reserves of fossil fuel by 2045. a.have been run out c.is going to be run out b.will have run outd.have run out4.If logging of tropical rainforests continues at the present rate, a 30 per cent increase in atmospheric CO2 by the year 2000. a.there will be c.there would be b.there might have beend.there could not have been5.Only by investing heavily in value-added exports from the present trade imbalance. a.the country can emerge c.can the country emerge b.the country might emerged.the country emerged6.The mystery of the double helix , the scope for genetic engineering dramatically increased. a.having solvedc.solving b.having been solvedd.solved7.Since the mid-60s considerable research in embryo transplants . a.has carried out c.has been carried out b.was doned.was carried out8. several hypotheses have been advanced for the disappearance of the dinosaur, no conclusive evidence supports any of them. a.despite c.although b.in spite ofd.in spite of the fact9.Until the 16th century the earth to be flat. a.is believedc.believed b.has been believedd.was believed10.If the temperature of the reactor 500C higher meltdown would have occurred. a.wasc.was being b.had been d.had11. adequate precautions are take, there is no risk involved in the operation. a.Although c.Nevertheless小黑雅思用心，出国学习省心！小黑雅思用心，出国学习省心！ 第第 2 页页 共共 4 页页 http:/www.eng86.com关怀热线：400-600-7921 官网： www.eng86.comb.Providing d.Even12.My supervisor advised me to the problem. a.look aheadc.look out of b.look downd.look into13.The more acid you add to the solution, it becomes. a.cloudier c.the cloudiest b.the cloudierd.more cloudy14.The lecturer said Its time you the literature review. a.beganc.should begin b.begin d.are beginning15.After studying our experimental results, the tutor suggested the experiment. a.us to repeatc.we repeat b.that we to repeatd.me to repeat16.After your results you should make an appointment with your tutor. a.you receivingc.you have received b.you would have receivedd.you received17.You the experiment twice, not once. a.should have carried outc.havent carried out b.shouldnt have carried outd.couldnt have carried out18.It looks youve made a mistake. a.as c.if b.as though d.perhaps19.After receiving her results, the student stopped . a.to worryc.worrying b.having worriedd.to be worried20.You include this section. It is not necessary a.must c.dont need b.couldntd.dont have to21.Unless an extension at least one week before the due date, it will not be given. a.you request c.you requested b.you will requestd.requesting22.The assignment made me . a.to think hard c.think hard b.thinking hardd.thought hard23.The scientists were prohibited the danger zone. a.to enterc.enter b.entering d.from entering24. the right answer I would have got full marks. a.Had I known c.If Ill know b.if I would have knownd.If I was knowing25.The results were convincing that we decided to publish them. a.so c.very b.suchd.so much小黑雅思用心，出国学习省心！小黑雅思用心，出国学习省心！ 第第 3 页页 共共 4 页页 http:/www.eng86.com关怀热线：400-600-7921 官网： www.eng86.com26. way you do it, the answer is always the same. a.However c.Who ever b.whicheverd.Why ever27. producing methane, the process also produces carbon monoxide. a.Apart c.Besides b.As well d.In addition28.The biologist admitted excessive numbers of animals in laboratory tests. a.using c.being used b.to use d.used29.A whale is a mammal, it is warm-blooded and gives milk to its young. a.whoc.which means that b.which d.that30.He appears minor problems. a.to have hadc.was having b.havingd.hadGrammar Practice Answer1.C11.B21.a2.d 12.D22.c3.B13.B23.d4.A14.A24.a5.C15.C25.a6.A16.C26.b7.C17.A27.c8.C18.B28.a9.D19.C29.c10.B20.D30.a小黑雅思培训已经推出：小黑雅思培训已经推出：雅思学员在线雅思口语学习平台；在线雅思语法学习平台；雅思阅读听力在线训练平台；首家雅思视频网校；小黑雅思用心，出国学习省心！小黑雅思用心，出国学习省心！ 第第 4 页页 共共 4 页页 http:/www.eng86.com关怀热线：400-600-7921 官网： www.eng86.com剑桥雅思八全真试题解析在线预订和购买平台小黑雅思更多资料欢迎关注官方更新：电话：400-600-7921 （24 小时客服）网站：www.eng86.com 博客：http:/blog.sina.com.cn/eng86 （全国公共雅思资料分享）微博：http:/t.sina.com.cn/liuzhiyun（小黑雅思学员全国服务平台，每日更新）信箱：toolandysina.com（小黑正式出版书籍答疑专用信箱）