1、201213017 答案I . 1-10 省略11 科学常识 12 以-存在 13 50% of the earths surface14 the distance of the sun from the earth 15 man-made16 three quarters 17 two-thirdsII. 学点探究1. 一般的，普通的，大体上的 A2. 在其他行星上存在生命吗？他们靠他挣的那点钱无法维持生活。Does life exist on Mars? 或 （on the Mars)3. 金属遇冷就收缩I will can be contracted to Ill.III. 句式点拔1.
2、 Four fifths of the students come from the countryside.50% of his income / earning was spent on books.2.他和我姐姐在同一个办公室工作。随堂：CADBC CDDKEY 18回顾: I A 1. 一般的词直接加 -er 构成比较级， 加-est 构成最高级2 .以 e 结尾的加-r 或-st 构成3. 重读闭音节如末尾只有一个辅音字母，则双写该辅音字母再加-er 或 -est.B 2. more most C more most , less least , elder eldest , wor
3、se worst,farther farthest / further furthest II 运用提高1.三种结构: 基数词 + times as adj as .基数词 + times + 比较级 + than.倍数 + the size/length/height .of .译：The hall is five times as big as our classroom.两倍用 twice ,double; 两倍以上用 基数词 + times2. 倍数的特殊形式They have built ten times more buildings than they did five year
4、s ago.The price of meat this year is twice what it was last year.The number of students in our school this year is twice that of last year.3. 特殊用法越多越好The more you speak English, the more fluent your English.随堂练习 1-5 AAABB 6-10 DCABB 11-15 DCCCAKEY to 019Fast-reading1. Potassium 2. Burns to form an o
5、xide3. Magnesium Aluminium Zinc 4. a slow reaction 5. No True or false 1 T F T 三 1-4 BACC 1-3 BDA四 缩写1 uses 2 important 3 react 4 substances 5 order 6 table7 most 8 Copper 9 put 10 formKEY to 020高频短语： 1 put-in order2 at the top / bottom of 3 add - to -4 keep -out of 重点句式：1. Two thirds, is 2 forty-ni
6、ne times larger than 3 it is important; react with, for example4. Here is , react most at the top, react least at the bottom5.Leave 6 brighter and brighter 7 the closer , the more知识详解：1 D 归纳 expand -into -Expand on 详细说明2 C 3 D （定期的，固定的） 4 D5 A A 6 A D句型梳理1 D D 2 A B课后单项 （12 个） CCCAC CCDBA AD完形 （20 个
7、）1-5 BCDAC 6-10CBBAA 11-15 ACDBD 16-20 AABBCCultural corner Keys: (201213021)Words: 1.facilities 2.lecture 3. department 4. amazed 5. discoveryPhrases: 1.过去常常做某事 2. 最新的设备 3. 理应或应当做某事4.以-为自豪 5.科学设备 6. 在某领域做出发现阅读：key：1B. 2C. 3D. 4A. 5C. Key:( C )Key: astonishedKey: astonishmentKey: You are not supposed to smoke on the bus.当堂检测：key: 1. B 2. A 3. C 4. D 5. BKey to 22.单选1-5CDCBB 6-10DDCAC 11-15B翻译句子单词阅读理解CACB改错1. breakfast 改为 supper 2. waiting 后加 for 3.去掉 back 4. worrying 改为 worried 5. was 改为 had 6. 去掉 up 7. pushing 改为 pushed 8. in 改为 on 9. 正确 10. so 改为 but
