初二下英语冀教版课件lesson17

1、Do you think tigers need our help? Why or why not? 1.century(centuries) 世纪2.fur(兽类的)毛3.symbol 标志；象征4.courage n.勇气；胆量 encourage v.鼓励5.brave adj. 勇敢的；无畏的 bravely adv.勇敢地 bravery n. 勇敢，勇气6.chain n.链子；链条;一连串；一系列7.balance n. 平衡；平稳 balanced adj. 平衡的；均衡的8.reason n. 原因，动机，理由reasonable adj. 合理的，公平的reasonably

2、 adv.合理地，相当地9.disappear v. 消失，失踪disappearance n. 消失 appear v. 出现10.kill v.杀死 killer n. 杀手，杀人者11.cut-cutting-cut-cut12.decrease-decreasing-decreased-decreased1.at the beginning of 在 开始的时候2.the number of 的数量 a number of 许多；大量3.drop to 下降到；跌至4.the symbol of 的象征the symbol for 的标志4.in danger of 处于危险状态5.a

3、s well (除某事或某人外)还；也6.cut down 把砍倒；减少7.keep in balance 保持平衡keep the /a balance of 保持的平衡1.The number of the students in our school is about 3500.the number of 一般接可数名词复数形式。作主语时，谓语动词用单数2.A number of students are playing in the playground.A number of 常修饰可数名词复数形式，作主语时，谓语动词用复数1.as well 意为“也，又”用于肯定句中，位于句首或句

4、尾，句尾不用逗号隔开。I am going to London and my sister is going as well .我要去伦敦，我的妹妹也要去。2.as well as 常用来连接两个并列的成分，意为“和，不仅 而且”，(with ,together/along with)当连接并列主语时，谓语动词与前一项保持一致。Tom as well as Jane and Rose is going to the farm by bus.1.In our school library there _ a number of books on science, and in these yea

5、rs the number of them _ growing larger and larger. A. are, is B. is, are C. have, are D. has, is2.- Is your friend Michael still in Australia? -I dont know, I have _information about him because we havent seen each other for _ years. A. a little, a few B. little, a few C. a few, a little D. few, a l

6、ittle 3. The teacher , Yang Xingming showed great _(勇气) to jump into the river to save the boy. Key: courage 4. Rub this oil into your skin and your headache will soon _( appear ) ! Have a try! Key: disappear5. _ your name on the paper and you can get a magazine. A. Cut down B. Look down C. Turn down D. Put