8B Unit8 A green world Comic & Welcome to the unit 【预学热身】 1. 过去经常做某事_____ 2. 乘地铁_____ 3. 关灯_____ 4. 骑自行车_____ 5. 减少空气污染_____ 【知识要点】 1. -I like digging in the garden. -Are you serious. dig vt& vi 挖（洞，沟等）过去式和过去分词是dug，现在分词形式digging serious adj”认真的，严肃的” 常用短语：be serious about 对...认真；nothing serious没什么严重的。seriously adv严肃地，认真地；seriousness n.严肃，认真 2. We can reduce air pollution by riding bicycles. reduce vt”减少，降低（水平，损失，价格等）”，“减轻（症状）”； 反义词 increase 增加；reduction n 减少；缩减 例如：the jackets have been reduced by 10% 夹克打九折 By 1995 this figure has reduced (from 5%) to under 4% 【词义辨析】 reduce to 降低到.....减少到.... 例如：the number of students reduce to 30.; reduce by 降低了....减少了... 例如：the number of students reduce by 30. 【例题】（2015 无锡中考）-I’ve decided to give up my job,Mum. -_____You’d better think twice. A. Sounds great B. What a pity C. Guess what? D. Are you serious 3. We can protect the environment by recycling waste. 介词by充当方式状语，recycle vt 回收利用，循环利用（强调可再生） 例如：rice straw can be recycled into a very good insulation material稻草可以回收制成很好的隔热材料。 【词义辨析】reuse & recycle reuse ：某种物体再次使用，但是物体还是原来的物体，没有被分解成新的物体，而且前后两次使用，用途一样。 recycle：材料可以循环使用加工成其他物品再生使用，物体前后使用用途不一样。 4. More and more families own cars and this causes serious air pollution. cause vt”导致，引起（不好的结果）” cause problems; cause flood 可接双宾语 cause sb sth=cause sth for sb “给某人带来某物”； cause sb/sth to do sth “导致某人／某物做某事” 例如： The cold weather caused the plans to die. 名词“原因，起因” 常与of连用“.........的起因” 例如：What’s the cause of the accident? 【例题】(2017 孝感调考）Every year driving after drinking wine _____a lot of traffic accidents. A. happens B. provides C. causes We were very sad and angry to hear that the bad milk power(劣质奶粉) _____the deaths of some babies. A. made B. put C. caused D. gave 5. It’s wise for people to choose public transport or ride bicycles. wise adj”明智的，充满智慧的” 句子中做定语和表语，比较级和最高级wiser，wisest wisely adv. 明智地；wisdom n 明智，智慧，才智。 【例题】我认为你在家自己教孩子并不明智 _____ Tony, remember _____with your mouth full of food. A. to talk B. not to talk C. talking - Would you like to attend the farewell party next week,Mr Huang? - Sure,I’d love to. I have no reason to _____your invitation. A. turn down B. turn off C. turn up D. turn on Reading 【预学热身】 1.允许某人做某事_____ 2.把......从......分离_____ 3. 从全国各地收集旧衣服 4. vt 惩罚_____ n._____ 5. 例如_____ 6. 丰富的资源_____ 7. 用完，耗尽_____ 8. vt 产生，导致 9. vt 污染_____ n._____ 10.对.......产生影响_____ 【知识要点】 1. It is a country with high mountains and clean blue lakes. with介词短语做定语，修饰名词country，翻译成：这是一个有着高山和干净蓝色湖泊的国 ... ...
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