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Unit 13 Were trying to save the earth!Section A (3a-4c)【基础预习】I. 根据汉语提示写出下面句中所缺的单词。1. I have a simple and easy _ (方法) to solve the problem. 2. We shouldnt be _ (残忍的) to animals. 3. Its _ (有害的) to your health to drink to much. 4. The city is the _ (工业) center of the country. 5. The car is too expensive, I cant _ (买得起) it. II. 写出下面短语的意思。1. take part in _2. turn off _3. pay for _4. hear of _5. be harmful to _【重点讲练】1. The method is not only cruel, but also harmful to the environment. 这种方法不仅残酷，而且对环境也有害。harmful 形容词，意为“有害的”。常构成短语be harmful to “对有害的”。Staying up often is harmful to your health. 经常熬夜对你的健康有害。【拓展】harm 名词，意为“害处”。常用构成短语do harm to “对有害”，相当于be harmful to. Too much smoking does harm to his health. = Too much smoking is harmful to his health. 吸烟过多对他的健康有害。【小试牛刀】改为同义句。Reading in the sun does harm to our eyes. Reading in the sun _ _ _ our eyes. 2. Have you ever taken part in an environmental project? 你曾经参加过环境保护活动吗？辨析：join, join in 和take part in join 加入组织，团体，党派等，有作为其中的一个成员的含义。后面也可以加表示人的名词，表示和某人一起参加某活动。join in加入一种具体活动。take part in 指参加会议或群众性活动等，着重说明句子主语参加该项活动并在活动中发挥作用。Willyoujoinusinthediscussion?你参加我们的讨论吗？ShejoinedtheYoungPioneers.她加入了少先队。Whydidntyoujoininthetalklastnight?昨晚你为什么没参加座谈？Did you take part in the sports meet? 你参加运动会了吗？【小试牛刀】单项选择。1. Have you _ a club? Yes, Im in a swimming club and I often _ the swimming training. A. joined; take part inB. joined; join C. taken part in; join D. taken part in; join in 2. Were going for a picnic. Would you like to_ us? Why not? Lets go! A. attendB. joinC. join inD. take part in 3. We cant afford to wait any longer to take action! 我们不能再等了，要采取行动了。 afford是动词，意为“买得起,担负得起”，通常与can,could,beableto连用,多用于否定句中。Theycouldntafford$50foraticket.他们拿不出50美元买一张票。 afford后面常跟带to的动词不定式。Wecantaffordtogoabroadthissummer. 今年夏天我们没有足够的钱出国。【小试牛刀】单项选择。Miss Taylor never wastes money on anything too expensive, even though she can _to. She has donated much of the money she saved to charities. A. affordB. allowC. remind D. pay【达标训练】I. 用方框中词的适当形式完成下面的句子。method, cruel, harmful, afford, law1. I think its _ to make such a young boy work all day. 2. The poor fisherman cant _ his childrens education. 3. I think the government must develop _ to protect environment. 4. Eating too much junk food is _ your health. 5. He can use different _ to work out the problem. II. 单项选择。1. Are you going to _ any of the events? Yes. Maybe long jump and high jump. A. take part inB. joinC. attend D. join in 2. I cant afford _ him an expensive birthday present. A. to buyB. buyingC. for buyingD. buy 3. Remember to _ the lights when you leave the room. OK. I will. A. turn onB. turn downC. turn upD. turn off 4. The girl always has some money to _ snacks. A. spendB. pay forC. takeD. cost 5. Look! _ boys are playing on the playground. Yes. _ them is about 200. A. The number of; A number of B. The number of; The number of C. A number of; the number of D. A number of; A number of III. 根据汉语提示完成句子。1. 我们必须采取行动来阻止他们。 We must _ _ to stop them. 2. 我从没听说过这个人。 I have never _ _ such a man. 3. 我们乐意尽力帮你摆脱困境。 We are glad to do what we can do _ _ _. 4. 到目前为止，我已经交了二十个朋友。 _ _, I have made twenty friends. 5. 实际上，她从没去过那儿。 _ _, she has never been there. Section A (3a-4b)【基础预习】I. 1.method 2. cruel 3. harmful 4. industry 5. afford II. 1.参加 2. 关闭 3. 付费 4. 听说 5. 对有害【重点讲练】1. is harmful to 2. AB3. A【达标训练】. 1. cruel 2. afford 3. laws 4. harmful 5. methods II. 1. A 表示参加某种活动或运动项目，用take part in。 2. A afford to do sth. 意为“负担得起某事”。3. D turn off意为“关闭”；句意：离开房间时记得把灯关上。4. B pay for sth. 意为“为付费”；句意：这个女孩总是有钱买零食。5. A the number of 意为“的数量”；a number of 意为“许多”；句意：看！许多男孩子在操场上玩。是的。他们的数量大约是200。III. 1. take action 2. heard of 3. to help out 4. So far 5. In fact
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