21世纪大学英语应用型综合教程2 1-5单元课后答案（完整版）
Unit 1
1.In the six-and-one half years sincet the federal government beagan certifying food as “organic,”Americans have taken to the idea with considerable enthusiasm.自联邦政府六年半前认证“有机”食品以来，美国人以极大的热情接受了这一概念。
2.To eat well, says Michael Pollanthe,the author of"In Defense of Food,"means avoiding "edible food_like substances"and sticking to real ingredients,increasingly from theplant Kingdom. “吃得好”，《食物无罪》的作者迈克尔波轮说，“意味着避免摄入‘可食用的类似的物质’，并坚持从蔬菜中获取真正营养成分的原则。
3.Neither the enabling legislation nor the regulations address food safety or nutrition. 不论有机食品的立法或是法规都未涉及食品安全或是营养问题.
4.Professor Howard that major corporations now are responsible for at least 25 perceent of all organic manufacturing and marketing. 霍华德教授估计，大公司现在承担了至少25%的有机食品生产和销售。
5.Popularizing such choices may not be as marketable as creating a logo that says"organic" . 推广这样的做法可能不会像设计一个“有机”的标志那么有市场.
1. It is more difficult topopularize education(普及教育)in the rural areas than in the urban areas.
2. Every country must stick toits own path（坚持自己的道路）.
3. I made clear to him that he should be responsible for the accident(为这次意外负责).
4. He neither knows nor cares(既不知道也不关心) what happened.
5. Many parents expressed concern about(表达了担忧)their children’s Internet addiction.
Unit 2
1. The two former elephant trainers had seen enough abuse and neglect at circuses and zoos to inspire them to create a sanctuary where elephants could live out their lives. 这两位前驯象员在马戏团和动物园见过太多大象所遭受的虐待和忽视，于是决心为大象建立一座可以颐养天年的憩息所.
2. Soon Hohenwald was rockingas the two greeted each other with ttrumpeting and celebratory bumping.不一会儿，霍恩沃尔德因他们相遇时互致问候的吼声和庆祝性的碰撞而震动起来
3. Shirley and Jenny instantly fell into their old routine,wandering the sanctuary side by side.雪莉和詹妮很快恢复了她们的老习惯：肩并肩地在保护区内闲逛.
4. At one point, the four spent therr hours trumpeting----the vibrations felt by evey living being in the sanctuary.有一次，四头大象持续三小时的鸣吼使保护区内的每个生命都为之震颤。
5. Elephants wear their hearts on their trunks ,as it were,so it was easy to tell that Shirley was not dealing well with Jenny is death----her eyes were half shut and her trunk dragged on the ground. 可以说大象不会隐藏他们的心情，因此和容易看出雪莉无法承受詹妮之死所带来的打击——他的眼睛半闭着，鼻子拖在地上。
1. It depressed us that(令我们情绪低落)no progress was made duringthe negotiation.
2.Don’t let it fall into thehands of enemy(落入敌人手中)。
3.Not a country can afford to neglect education(忽视教育)
4.He drew out all his money(取出所有的钱)from the bank.
5.Some condemn him, while others praise him(而有些人却赞扬他).
Unit 3
1. Sport has the power to change the world,the power to inspire,the power to unite people in
