Unit 3 A healthy life3. Grammar：it的用法（I）一、单句语法填空。在空白处填入适当的内容（1个单词）或括号内单词的正确形式。1. Since you can solve the problem, I dont feel _ worthwhile taking such trouble.2. From the teachers patience and understanding, I have learnt what a big responsibility it is _ (educate) us.3. Chinese parents think less of money _ it comes to educating their children.4. Catherine bought a postcard of the place she was visiting, addressed _ to herself and then posted it at the nearby post office.5. Id appreciate it _ you would like to teach me how to use the computer.6. It worries me the way he keeps _ (change) his mind.7The films still have an effect _ the education of the young generation today.8I recognized him _ moment I saw him in the crowd.9He didnt make _ clear when and where the meeting would be held.10She felt ashamed _ doing that and tears ran down her cheeks.11Bill was doing a lot of physical exercise to build up his _(strong)12He _(ban) from driving for drunk driving last year.13Sport is not only physically but also _(mental) challenging.14I feel like _(take) a long walk. Would you like _(go) with me?二、语法填空。阅读下面材料，在空白处填入适当的内容(1个单词)或括号内单词的正确形式。Today I received a sweet letter from Brianna, one of my “cookies”. It was wonderful to hear 15_her. You see 16_ I taught kindergarten, I called all 17_ sweet children “cookies”. Brianna said that every day she would walk into kindergarten and see a smile 18_ my face. I named them “cookies” because I always feel that children can bring great happiness and19_ (excite) to my life. I still feel that all children are the 20_ (great) joy I could ever have.So far I 21_ (adopt) and taught children for over 35 years. All my children were 22_ are now a great joy of my life. 23_(hope), I feel much fortunate to be able to use my lifes talent to teach children and have fun 24_(do) it every day. I am able to spread my wings and help my “cookies” to spread their wings.三、七选五。根据短文内容，从短文后的选项中选出能填入空白处的最佳选项，选项中有两项为多余选项。Leading a healthy life doesnt only mean going to the gym and working out. It further means taking care of your body and making it easy to manage healthy choices in day-to-day life. _25_. Here are few tips to lead a healthier life.Drink lots of water:Water is very essential for our body to function. Most of us do not know that over 60% of our body is made up of water. It is very much needed in our body as it carries out body functions, removes waste and carries nutrients and oxygen around our body. We should take lots of water every day, as we lose water through daily activities.Eat lots of fruits:_26_. Eating lots of fruits benefits our body with vitamins and minerals. For example-Oranges gives more health benefits than vitamin C pills. In order to lead a healthy life one must eat a plateful of nutritious fruits every day.Exercise:Exercising daily brings tremendous benefits to our body. Exercising increases the life span, lowers the risk of diseases, leads to higher bone density and helps in weight loss. _27_Enough sleep:Sleep is a must for healthy living as our body needs rest after a day of hard work. If you dont get enough sleep you tend to eat more. _28_ . So try to avoid these problems and let your body heal, get enough sleep._29_:Smoking is not good for health, as it leads to lung cancer, kidney cancer, heart attack and much more. Health risks cannot be decreased by smoking light cigarettes. To enjoy a healthy living, quit smoking.A. Quit smoking.B. Increase of physical activity will lead us to healthy living.C. We should keep ourselves from drinking dirty water.D. Some entertaining games can make you refreshed.E. Our body will take us through the various phases of life.F. Even you may face early aging and dark circles beneath your eyes.G. Healthy eating is a must to have a healthy lifestyle.四、完形填空阅读下面短文，从短文后各题所给的四个选项 (A、B、C和D)中，选出可以填入空白处的最佳选项。In the past, man did not have to think about the protection of his environment. There were few people on the earth, and natural resources（资源）seemed to be30. Today things are 31, the world has become too32. We are using up our natural resources too quickly, and at the same time we are33our environment with dangerous chemicals. If we continue to do this, human life on the earth will not 34. Everyone 35today that if too many fish are taken from the sea, there will soon be none left. Yet, with modern fishing 36, more and more fish are caught. We know that if too many trees are cut down, 37will disappear and nothing will grow on the land. Yet, we 38to use bigger and more powerful machines to 39more and more trees. We realize that if rivers are polluted with waste products fr