Suggested answers:

　　1.sunburnt　2.hunger　3.rid...of　4.expand　5.circulate　

　　6.lead a...life　7.would rather　8.thanks to　9.struggle　10.export

　　T:Now Let's come to Ex.2.Please complete the passage with words and expressions from the previous sections,then I'll ask you to give me the answers sentence by sentence.

　　After several minutes,the teacher ask the students to give their answers.

　　Suggested answers:

　　1.prove　2.would rather　3.live a　4.life　5.rid　6.of　7.output　8.increased　9.sunburnt

　　T:How about Ex.3,have you found the answers?I'd like to ask some of you to read the sentences and then give me the answers.

　　Suggested answers:

　　1.super　2.satisfied　3.strain　4.exported　5.suitable

　　Step 3 Discovering useful structures

　　T:Let's come to discovering useful structures,at first let's finish the exercises in this part.Do you know what does " even a poor person can have a wish" mean?

　　S:It means "Wishing for things costs nothing."

　　T:Very good!Now please rewrite the sentences in Ex.2 on Page 12.

　　After five minutes,the teacher checks the answers.(Ss answer the questions one by one.)

　　Suggested answers:

　　1.Helping people in need of help is nice.

　　2.Growing hybrid rice isn't easy.

　　3.Learning more about farming isn't difficult.

　　4.Doing research in the countryside isn't easy.

　　5.Getting rid of hunger is very important in some African countries.

　　6.Explaining this again is important or we will get confused.

　　T:Do you think it's very easy to learn about the -ing form as the subject?But how about the -ing form as the object?Now I'd like to check the answers of Ex.3 on Page 12.

　　(Ss give the answers one by one.)

　　Suggested answers:

1.Dr Yuan likes talking to rice growers about his work.