aluminium; brick; concrete; glass; mud; plastic; rubber; steel; stone; wood 1. man-made materials _____21世纪教育网版权所有 2. Natural materials _____ 3. Metal materials _____ 4. No-metal materials _____ 【参考答案】 I.(1-5) Aluminium; Steel; rubber and wood; Plastic; Bricks (6-9) Concrete; Mud; Stone; Glass II. (1) brick; concrete; mud; plastic; glass （2）aluminium; rubber; steel;stone; wood （3）aluminium; steel; （4）brick; concrete; glass; mud; plastic; rubber; stone; wood Words and expressions power 【语境理解】阅读下面句子，并试着归纳power的意思。 1. The ship was helpless against the power of the storm.2·1·c·n·j·y 2. You should cut off the power before attempting to repair electrical equipment. 3. I had always believed such an achievement was beyond my power. 4. Does the President have more power than the Prime Minister? 5. Nowadays electricity can be used to power buses and cars. 【归纳】 ★power作名词时： ①力量（句1）；②电力（句2）；③能力（句3）；④权力（句4）。 ★power作动词时：供给动力（句5）。 【练一练】 Put the following into Chines 1. After the accident she lost the power of speech.21·世纪*教育网 _____ 2. We need to provide industry with power it can afford. _____ 3. All these modern educational equipments are powered by electricity. _____ 【参考答案】 1. 事故后她失去了语言能力。 2. 我们需要为工业提供他们负担得起的电力。 3. 所有这些现代化的教学用具都是电动的。 limit 【语境理解】阅读下面句子，并试着归纳limit的意思及用法。 1. He had not been outside the limits of the town for 20 years.【来源：21·世纪·教育·网】 2. There's a limit to how much I'm prepared to spend.【来源：21cnj*y.co*m】 3. A lack of formal education will limit your job opportunities.21*cnjy*com 4. Families are limited to four free tickets each. 5. Violent crime is not limited to big cities. 【归纳】 ★limit作名词时： ①范围，边界（句1）；②限制，限度（常与介词_____连用）（句2）。 ★limit作动词时：“限制，限定”（常用搭配：limit sb. / sth. to sth.） （句3———句5）。 【练一练】 Put the following into English 1. 她知道自己的权限。 _____ 2. 我限定自己每天喝两杯咖啡。 _____ 【参考答案】 1. She knows the limits of her power. 2. I limit myself to two cups of coffee a day. attach 【语境理解】阅读下面句子，并试着归纳attach的意思及用法。 1. The boy attached a rope to the tree. 2. Please attach a recent photograph to your application form. 21*cnjy*com 3. We should attach importance to the question. 4. Let us not attach too much significance to these meetings.【出处：21教育名师】 【归纳】 ★attach：“系，附上” 常用搭配为attach sth. _____ sth.（句1、2）；“认为有（重要性、意义）”，常用搭配为attach importance / significance to sth.（句3、4）。 【练一练】 Put the following into Chines 1. They attach much importance to education. _____ 2. The horse was attached to a tree. _____ 【参考答案】 1. 他们认为教育很重要。 2. 马被拴在一棵树上。 rely on 【语境理解】 阅读下面句子，并试着归纳rely on的意思及用法。 1. Don’t rely on chance; rely on yourself. 2. As babies, we rel ... ...
