1、Unit 1 课下题型练(二) Grammar and usage.阅读理解AAll too often, a choice that seems sustainable (可持续的) turns out on closer examination to be problematic.Probably the best example is the rush to produce ethanol (乙醇) for fuel from corn.Corn is a renewable resource you can harvest it and grow more, almost limitl
2、essly.So replacing gas with corn ethanol seems like a great idea.One might get a bit more energy out of the ethanol than that used to make it, which could still make ethanol more sustainable than gas generally, but thats not the end of the problem.Using corn to make ethanol means less corn is left t
3、o feed animals and people, which drives up the cost of food.That result leads to turning the fallow land including, in some cases, rain forest in places such as Brazil into farmland, which in turn gives off lots of carbon dioxide into the air.Finally, over many years, the energy benefit from burning
4、 ethanol would make up for the forest loss.But by then, climate change would have progressed so far that it might not help.You cannot really declare any practice “sustainable” until you have done a complete lifecycle analysis of its environmental costs.Even then, technology and public policy keep de
5、veloping, and that development can lead to unforeseen and undesired results.The admirable goal of living sustainably requires plenty of thought on an ongoing basis.1What might directly cause the loss of the forest according to the text?AThe growing demand for energy to make ethanol.BThe increasing c
6、arbon dioxide in the air.CThe greater need for farmland.DThe big change in weather.2The underlined word “it” in the second paragraph refers to Athe energy benefitBthe forest lossCclimate changeDburning ethanol3What does the author mainly discuss in the text? ATechnology.BSustainability.CEthanol ener
7、gy.DEnvironmental protection.BA car needs gas to run and your body also needs food to work for you.Eating the right kind of food is very important.It can help your body grow strong to take care of what you eat.There are four main food groups altogether.The dairy group has food like milk，cheese and s
8、our milk.The other three groups are the meat and fish group，the fruit and vegetable group，and the bread and rice group.Each meal should have at least one food from all four main groups.With all these food together，you will be given enough energy during the day.It is easy to get into bad eating habit
9、s.You may eat your breakfast in a hurry to get to school on time.Or you may not have time for a good lunch.It may seem easy to finish your supper with fish and chips all the time.But you will find yourself tired in these days and you can not think quickly.Watching what you eat will help keep your bo
10、dy healthy and strong.It is also good to take some exercise.It will help you eat more if you take a walk or play games in the open air.Having a good eating habit with some exercise is the key to your health.4The underlined word “dairy” in the second paragraph means Athe food made out of cows such as
11、 milk and butterBthe shop that sells milk and butterCa farm where cows are keptDa place where milk products are made5Which of the following diets do you think is the best one?AEggs, tomatoes and chicken.BMilk, bread, cabbages and beef.CCorn, fish, cream and pork.DRice, beancurd, apples, fish and chi
12、cken.6In this passage the writer mainly tells us that Aevery person needs food to grow wellBtaking exercise can keep your body strongCright kind of food with exercise will keep you healthyDenough energy helps people think more quickly.完形填空With all the reports of how unhealthy fast food is, why is an
13、ybody still eating it? The 1 is, it is cheap, convenient and filling.The problem is that just one fast food meal can provide enough calories, sodium and fat for an 2 day or more！Eating fast food too often can 3 a variety of different health problems 4 obesity.A recent study from Reuters 5 that fast
14、food companies are increasing 6 to market themselves to children through television ads and websites geared to kids.In fact, the fast food industry 7 more than 4.2 billion in 2009 on marketing and advertising! Why do companies spend so much money on child targeted advertising? Because it 8 These com
15、mercials cause our children to hunger for these 9 foods.And with the average child 10 to over 40，000 commercials a year, it is no 11 children have a desire for fast food.Because of the epidemic (频发) of the childhood obesity, San Francisco passed a law about fast food.The law, which took 12 on 1 Dece
16、mber 2011, limits the fast food industrys practice of 13 toys with childrens meals.Kids meals must meet certain nutritional standards before they can be sold with toys.They must be less than 600 calories, contain fruits or vegetables and include beverages (饮料) without excessive fat or sugar.Toys ten
17、d to attract children to these kids meals so certainly this law will 14 Eating fast food doesnt have to be a disaster.There are ways to make healthy 15 So while the healthier choices are there, its really up to the consumer to pay close attention while ordering.1A.troubleBfactCreasonDdisaster2A.enti
18、reBordinaryCaverageDextra3A.stand forBresult fromCbring inDlead to4A.regardingBjudgingCincludingDfollowing5A.showsBlearnsCthinksDwonders6A.moneyBpressureCdangersDefforts7A.spentBgainedCcompletedDsaved8A.mattersBexistsCremainsDworks9A.importantBnaturalCunhealthyDuncommon10A.stuckBappealedCexposedDadd
19、icted11A.troubleBwonderCworryDneed12A.measuresBeffectCstepsDrisks13A.giving offBgiving outCgiving upDgiving away14A.stopBhelpCchangeDlast15A.plansBdecisionsCchoicesDchanges.语法填空Eating at restaurants hasnt always been known as the best choice for people who are trying to keep a healthy diet.It is 1 (
20、extreme) hard for people to avoid food that isnt so good for them when dining out.However, you dont have to give 2 your love of restaurants.There are 3 (way) that you can eat healthier food when dining out.One method is to take time 4 (read) the nutrition information.Some restaurants post it on thei
21、r menus or their website.If you know youre going to visit 5 certain restaurant, you should check the website first.If no nutrition information 6 (list), you should check the menu at the restaurant before you order.Another way is to think about not eating cream or butter sauces.Instead, consider 7 (c
22、hoose) a sauce that could add a rich flavour to your food without extra calories (卡路里)All restaurants have water available.Whether it is free 8 you have to buy it, you should choose to drink water over other drinks like beer or soda, which contains a lot of calories.Eating out doesnt have to be an u
23、nhealthy 9 (decide) as long as you make wise choices.You could still enjoy all of the benefits of dining out and be 10 (please) with your choices later on.语篇解读： 本文是一篇议论文。文章主要谈论了可持续性发展的判断依据以及相关的一些事实。1-3C A B 语篇解读：本文是一篇说明文。文章主要介绍了合理饮食和运动是保持健康的关键。 4-6A B C 语篇解读：本文是一篇说明文。文章分析了快餐存在的理由，并认为明智的选择才是关键。1-5 C A DC A 6-10 D A DC C 11-15B B D B C 语篇解读：本文是一篇说明文。文章介绍了在外面吃饭时应如何健康地饮食。1extremely 2up 3ways 4to read 考查非谓语动词。take time to do sth意为“花时间做某事”。5a 6is listed 7choosing 8or 9decision 10pleased 学科网（北京）股份有限公司
