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教材习题点拨
COMPREHENDING
Answers to Exercise 1：
Name：Yuan Longping
Nationality：Chinese
Age：81 (as of 2011)
Occupation：scientist/farmer
Education：graduated from Southwest Agricultural College in 1953
Dream：to export his hybrid rice so that it can be grown around the globe
Achievement：in 1974，developed hybrid rice which produces 1/3 more than normal rice
Hobbies：listening to violin music，playing mah­jong，swimming and reading
Suggested answers to Exercise 2：
1 Even when he was a young man，he knew how important it was to produce bigger rice crops.
2 During his early years，much of the countryside was troubled by hunger.
3 As they use his hybrid rice，farmers are producing twice as much rice as before.
4 He is not interested in buying things for himself or in having a comfortable life.
5 It does not cost anything to dream for something.
Suggested answers to Exercise 3：
1 Yuan Longping wanted to increase the rice output because he saw many people go hungry when he was young.
2 I think he is more of a scientist，although he works in the fields like a farmer.His main purpose is not to make a profit for himself but to study agriculture and use that knowledge to improve farming for farmers everywhere.I do not think he is a business man，because his goal is not to make money.
3 Because of his work with developing hybrid rice，it seems that Yuan Longping must be a very patient and careful man.He didn't give up but kept working on his project.He also seems to use his invention to help hungry people around the world.
4 I think Yuan Longping was successful because he kept working and did not give up.He also grew up in a poor family，so he was very motivated to succeed and help other farmers around China.
5 I mostly agree.I think being rich can cause a lot of problems，but it really depends on the life and attitude of the person who is rich.People who are rich certainly have different problems from people who are not.
6 I think developing other hybrid grains would make a great difference in the problem of world hunger.Hybrid grains that can survive in very dry or very hot areas would be very useful in Africa and other areas.Hybrid grains that cannot easily be killed by insects and diseases would be useful around the world.
LEARNING ABOUT LANGUAGE
Discovering useful words and expressions
Answers to Exercise 1：
1 sunburnt　f　3 expand　4 circulate　5 would rather　6 struggle　7 export
8 satisfied with　9 equip　10 crops　11 thanks to
Answers to Exercise 2：
1 statistics，globe　2 super，nationalities  3 Hunger，disease　4 Vietnam，occupations　
5 freedom，exported
Answers to Exercise 3：
decade，struggle，expanding，Equipped，output，grain，crops，battles，disturbing
Discovering useful structures
Answers to Exercise 1land：
Subject：Since then，finding ways to grow more rice has been his life goal.
Object of preposition：As a young man，he saw the great need for increasing the rice output.
Object of preposition：Yuan Longping searched for a way to increase rice harvests without expanding the area of the fields.
Object of verb：He enjoys listening to violin music，playing mah­jong，swimming and reading.
Subject：Spending money on himself or leading a comfortable life also means very little to him.
Subject：Just dreaming for things，however，costs nothing.
Object of preposition：He awoke from his dream with the hope of producing a kind of rice that could feed more people.
Answers to Exercise 2：
1 Helping people in need of help is nice.
2 Growing super hybrid rice is not easy.
3 Learning more about farming is not difficult.
4 Doing research in the countryside is not as easy as in the city.
5 Getting rid of hunger is very important for some African countries.
6 Explaining this again is important or we will confuse the students.
Answers to Exercise 3：
1st group：to do
2nd group：doing
1st group：promise，fail，hope，afford，plan
2nd group：enjoy，finish，mind，miss，keep
3rd group：try，stop，begin，forget，like，start
Answers to Exercise 4：
1 to see　2 learning　3 having　4 to experiment　5 trying out　6 to find out　7 to develop
8 to fail　9 owning　10 sending
USING LANGUAGE
Reading
Suggested answers to Exercise 1：
1 They are a great way to stop crop disease and increase production.
2 They can damage the land by killing helpful bacteria and pests and by staying in the ground and underground water for a long time.They damage people's health by building up in their bodies and leading to cancer or other illnesses.

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