5 boil Cook something in boiling water 　　LEARNING ABOUT LANGUAGE

　　Discovering useful words and expressions

　　Answer key for Exercise 1

　　1 lie　2 get away with　3 raw　4 curiosity

　　5 customer　6 benefit

　　Answer key for Exercise 2

　　2 ought to　4 diet　5 raw　8 balanced

　　9 energetic　10 slim

　　1．become thinner-lose weight

　　3．being laughed at by her friends-losing face

　　6．felt so sad and hopeless about herself-lost heart

　　7．was unwilling to visit may more-lost interest in visiting

　　Answer key for Exercise 3

　　1 √ pear；× cream(fat and all the others are fruit)

　　2 √ sugar；×mutton(meat and all the others are energy­giving food)

　　3 √ bacon；× cabbage(vegetable and all the others are meat)

　　4．√ strawberry；× eggplant(vegetable and all the others are fruit)

　　Discovering useful structures

　　Answer key for Exercise 1

　　Then by lunchtime they would all be sold.(Possibility)

　　By now his restaurant ought to be full of people.(Possibility)

　　What could have happened？(Possibility)

　　Nothing could be better...(Possibility)

　　Something terrible must have happened if...(Guessing)

　　I'll help you lose weight...(Intention)

　　He could not believe his eyes.(Ability)

　　Perhaps he should go to the library and find out.(Duty)

He could not have Yong Hui getting away with telling people lies！(Intention)