必修四第二单元课文1教学案

制作人：曹倩

审核人：郭光宝

使用时间：2015-4-.22

年级签字：

编号： 27

——课前预习案——

1. Read the text and match the main idea of each paragraph.

Para1         A. Dr Yuan’s dreams.

Para2         B. Dr Yuan’s personality.

Para3         C. Dr Yuan’s biography.

Para4        D. Dr Yuan’s appearance and his achievement.

——课中探究案——

一、检查反馈，导入新课。

Have a dictation:_____________________________________________

二、目标定位，确定重点。

1. Comprehend the text fully according to the clues.

2. Master all the phrases (21) in the text.

3. Master the important points (5). 

三、自主探究，教师点拨。

Para1:

What does Dr Yuan look like?

He has a _______ face and arms and a ____, ________ body.

Para2: Put Dr Yuan’s biography in right order.

a. He was born in 1930.

b. He graduated from Southwest Agriculture college.

c. In 1950, Chinese farmers produced 56billion tons of rice.

d. 200 million tons of rice was produced by growing his hybrid rice.

e. He searched a way to increase rice outputs without expanding the area of fields.

f. He helps rid the world of hunger by circulating his knowledge in less developed countries.

Proper order: _______________________________________.

Para3：Which of the following description about Dr Yuan’s personality（个性） is not true?

A. He is satisfied with his life because he is now rich and famous.

B. He cares little about money and fame（名声）.

C. He would rather work than lead a comfortable life.

D. He enjoys a simpler life than most rich and famous people.

Para4：

What are his two dreams?

The first dream: produce a kind of rice as ___as sorghum, as_____ as a corn, as _____as a peanut.

The second dream: _____________________________________. 

四、尝试演练，合作解疑。

Important phrases:

01._____________根据      02._____________世界卫生组织

03._____________认为…是  04._____________做研究

05._____________千百万    06._____________在过去50年

07._____________毕业于    08._____________在那时

09._____________寻找      10._____________欠发达国家

11._____________多亏      12._____________使...摆脱

13._____________对…满意  14._____________在乎

15._____________宁愿      16._____________过…的生活

17._____________而不是    18._____________为…装备

19.__________怀有…的希望 20._____________遍及全球

21._____________ 喜欢；关心；照顾

Important sentences:

1. Dr Yuan Longping grows what is called super hybrid rice. 袁隆平博士种植的是被称为“超级杂交水稻”的稻种。

分析：what 引导的宾语从句，what在从句中做主语。

2. Born into in 1931，Dr Yuan graduated from Southwest Agriculture College._____________________________________________________

3. In 1974, he became the first agriculture pioneer in the world to grow rice that has a high output. 1974年他成为世界上第一位种植高产水稻的农业先锋。

句型：第一个/最后一个做某事…的人/物  the first /last +名词 to do sth .

4.  Using his hybrid rice, farmers are producing harvests twice as large as before.

用他的杂交水稻种子，农民们种出的粮食比以前多了一倍。

倍数表达法共有三种形式:

(1) 倍数 + 形容词/副词的比较级 +than...

(2) 倍数 + as +形容词/副词的原级 + as...　

(3) 倍数 + the + 名词+ of...

5 The special strain of rice makes it possible to produce one –third more of the crop in the same fields.这些特殊的水稻使得同样的田地多收获三分之一的产量。

分析：it 形宾,真正的宾语是后面的不定式。

Make/ feel/think/find+ it + adj + to do sth

五、当堂检测，拓展延伸。

1 .Ten years ago the population of our village was _____ that of theirs.

(2008 陕西 )

   A. as twice large as   B. twice as large as 

C. twice as much as    D. as twice much as

2 I like this jacket better than that one, but it costs almost three times______.

A. as much    B. as many    C. so much      D. so many

3 It is reported that the United States uses ___ energy as the whole of Europe.          A. as twice         B. twice much       

 C. twice much as    D. twice as much

4 The chairman thought ____necessary to invite Professor Smith to speak at the meeting .     A. that   B. it  C. this  D. him  

5 A modern city has been set up in ____was a wasteland ten years ago.

A. What B. Where  C. That  D. Which

6  Some children want to challenge themselves by learning a language different from ____their parents speak at home.  (2008 浙江 )

      A. what   B. that    C which  D one 

7  According to a recent US survey, children spend up to 25 hours a week ____ TV.    A. to watch  B. to watching    C. watching D. watch 

8. He is the last person______ to Mary’s birthday party.

A. to invite     B. to be invited C. invited       D.  being invited

                     ——课后巩固案——

1. If your blood__ badly, your hands and feet will get cold easily.

  A. passes  B. crosses  C. circulates D. circles

2. --- Shall I open the window to let some fresh air in?

--- No, _______.          .

  A. I’d rather not       B. I’d rather you not 

C. I’d rather you didn’t  D. I’d like not to

3. He got completely ______when he saw both Lucy and Lily, who are twin sisters.  A. confusing    B. confused  C. confuse  D. confuses

4. The professor referred to ________yesterday.

A. come   B. came   C. coming D. comes

5. He insisted that he ___from heart trouble, but I didn’t think so.

  A. should suffer  B. has suffered  C. suffers    D. was suffering

6. It is generally considered unwise to give a child_____ he or she wants.

  A. however     B. whatever     C. whichever   D. whenever

7. --- What happened to your shoes?

  --- They want______ .

  A. to mend   B. being mended   C. mending D. mended

8. The boy is only five years old, but he is quite used _______the telephone.

  A. to answer    B. to answering   C. of answering D. by answering

9. The officers narrowly escaped ___in the hot battle.

  A. have killed   B. to kill      C. to be killed     D. being killed

10. Did you find _____impossible for him to tell the truth?

  A. this      B. it       C. that      D. what

11._____ my English teacher, I have become what I am.

  A. Thanks for    B. Thank to   C. Thanks to  D. Thank for

12. The house rent is expensive. I’ve got about half the space I had at home and I’m paying ______here.

  A. as three times much         B. as much three times

  C. much as three times         D. three times as much

13.When I said that some people are stupid I was not ________you.

  A. talking to   B. referring to   C. turning to D. listening to

14. Do you know that _____with wise men improves your mind?

  A. chat     B. chats    C. chatted   D. chatting

15. While shopping, people sometimes can't help ________ into buying something they don't really need.

A. to persuade B. persuading C. being persuaded D. be persuaded

16. ----How do you deal with the disagreement between the company and the customers?

----The key ____the problem is to meet the demand ____ by the customers.

A. to solving; making B. to solving; made

C. to solve; making D. to solve; made

17. How about the two of us ________ a walk down the garden?

A. to take   B. take   C. taking D. to be taking

18. ---What do you think made Mary so upset?

--- ________ her new bicycle.

A. As she lost   B. Lost   C. Losing D. Because of losing