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1、Unit 7 The Sea李仕才一、阅读理解。In the dead of winter，we dont typically think about spending time outdoors，but according to many physicians we should.The sun is our greatest source of a vitamin that is essential for good healthVitamin D.This important vitamin strengthens bones and teeth and is linked to the
2、 prevention of heart disease，cancer and many other lifethreatening diseases.The recommended daily requirement is 400600 International Units(IU)In summer，people with dark brown eyes and darker skin turn sunlight from just 15 minutes outside without sunscreen into adequate amounts of Vitamin D.Even du
3、ring winter，just a 10minute walk at midday can keep the bodys Vitamin D at healthy levels.During brief winter walks，we receive the greatest benefits when we wear no sunscreen and expose as much skin to the sun as possible.Vitamin D can be also obtained from foods.Salmon is one of the best sources of
4、 the Vitamin.Egg yolks(蛋黄)，cheese，mushrooms and some animal organs contain smaller quantities of it.To attract consumers，food companies add Vitamin D to some of their milk products.The practice of putting the Vitamin into milk began in the 1930s.At that time，many children were suffering from rickets
5、，an illness that is caused by a deficiency (缺乏)of Vitamin DIt made the childrens bones soft and weak.Adding Vitamin D to milk helped to solve the problem，and it has been available ever since.For people who still need more Vitamin D，there is another option：Take Vitamin D supplements(补充物)These product
6、s are widely sold in stores.However，anyone considering taking supplements should consult a physician first.1During the winter months，people _.Aarent able to meet their deadlinesBoften dont dress warmly enoughCgenerally like to remain indoorsDleave lots of work for others to do2According to the text，
7、Vitamin D _.Acan be obtained by being exposed to the sunBcan be used to cure lifethreatening diseasesCcan be mainly found in some milk productsDcan make the childrens bones soft and weak3Why is salmon mentioned in this article?AIts seldom prepared in the correct way.BIts a useful addition to a perso
8、ns diet.CIt has a huge impact on the environment.DIts advantages have been exaggerated.4The main purpose of this article is _.Ato introduce a valuable nutrientBto advertise Vitamin D supplementsCto note risks associated with a nutrientDto explain how a nutrient was discovered【解题导语】本文是一篇科普文，主要介绍了维生素D
9、的一些情况。1C考查细节理解。根据第一段中的“In the dead of winter，we dont typically think about spending time outdoors，but according to many physicians we should”可知，在冬天人们愿意待在室内。2A考查推理判断。根据第一段第二句以及第三段第一句可知，维生素D可以通过晒太阳获得，故选A。3B考查推理判断。根据第四段可知，三文鱼是补充维生素D的食物，因此对我们的饮食是有用的补充物，故选B。4A考查主旨大意。根据全文可知，本文主要介绍一种营养成分维生素D。二、阅读下面材料，在空白处填
10、入适当的内容(1个单词)或括号内单词的正确形式。(2017广东六校统考)Do you ever stop and think about this big，beautiful world we live in？Its home 61._ so many people and animals.We all live in this amazing place，so we all have the 62._(responsible) to take care of it，too.A long time ago，I started thinking about what I could do to
11、help take care of the planet.I wondered 63._ I could use my talents for good.I love creating websites and making art and designing clothes.Thats what 64._(inspire) me，at age 8，to start an online company.I donate part of my profits to organizations 65._(try) their best to save our environment.After I
12、 launched my business，I started getting 66._(invite) to give presentations to young people about my company and the environment.I also talk about something else that 67._(be) meaningful.One thing Ive learned is that a lot of people feel like 68._ small contribution to any cause is just a drop in the
13、 bucket and wont make a difference.But thats not true！69._(actual) when it comes to saving our environment，every small action counts.The 70._(tiny) thing is better than the greatest intention.【解题导语】保护环境，从我做起；拯救地球，从小做起。作者8岁时创立网络公司，把一部分利润捐给热衷环保的组织。最小的行动胜过最大的打算。你行动起来了吗？61to解析：考查介词。be home to意为“是的栖息地”，为
14、固定搭配。62responsibility解析：考查词性转换。我们都住在这个令人惊叹的地方，因此人人也都有责任照顾它。根据空前的“have the”可知此处应填一个名词，responsibility意为“责任，职责”。63how解析：考查宾语从句。分析句子结构可知，空处引导的从句作wondered的宾语，且根据句意可知，此处表示方式，故用how引导该从句，表示“我想知道我如何能把我的才能发挥好”。64inspired解析：考查时态。空处的前一句和后一句都用的是一般现在时，但是根据空后的时间状语“at age 8”可知，此处描述的是过去发生的事情，应用一般过去时。65trying解析：考查非谓语
15、动词。我把收益的一部分捐给尽最大努力挽救我们的环境的组织。分析句子结构可知，organizations与try之间是逻辑上的主谓关系，故此处应用现在分词形式作后置定语。66invited解析：考查非谓语动词。创业后，我开始受邀给年轻人作关于我的公司和环境的讲座。此处是get done“被”结构，故填过去分词。67is解析：考查主谓一致和时态。that引导定语从句并在从句中作主语，that指代的是something else，表示单数含义，故从句谓语动词用单数形式。此外，这里表示客观的情况，故应用一般现在时。综上可知本空填is。68a解析：考查冠词。很多人觉得对任何事业的小小贡献都是杯水车薪，不会有什么影响。这里表示泛指，且contribution是可数名词，故用a。注意：feel like后面是一个省略了引导词的从句。69Actually解析：考查副词。但那是错误的！事实上，谈到拯救环境，每一个小小的行为都很重要。空处作状语修饰整个句子，故要用副词。actually“事实上”。70tiniest解析：考查形容词最高级。根据空前的“The”和句意“最微小的事情也比最伟
