food 是食物的总称。凡是可以充饥的有营养的东西都可以称作food，常作不可数名词；但表示食物的种类时为可数名词 　　用diet和food填空

　　③There are food shortages in many areas.

　　④Diet cures more than the doctor.

　　⑤The sick man mustn't go without food,_but he must have a diet without sugar.

　　2．balance vt.& vi.平衡；权衡　n．天平；平衡

　　★背诵佳句培养语感

　　(教材原句)What will happen to you if you don't eat a balanced diet?

　　你如果没有均衡的饮食将会怎么样？

　　(鲜活例句)You have to balance the advantages of living in a big city against the disadvantages.

　　你必须权衡住在大城市的利与弊。

　　(鲜活例句)Losing balance, he fell down from the balance beam.

　　没有站稳，他从平衡木上掉了下来。

　　★归纳拓展全析考点

(1)keep one's balance保持平衡

lose one's balance 失去平衡

on balance 总的来说

out of balance 不平衡

(2)balanced adj. 平稳的；安定的；和谐的

(3)balance A against B 在A和B之间权衡 形象记忆 　　

　　①He lost_his_balance and hurt himself when he went upstairs.

　　他上楼时失去了平衡伤了自己。

　　②You'd better balance the advantages against the disadvantages.

　　你最好权衡一下利弊。

　　3．curiosity n．好奇心

　　★背诵佳句培养语感

　　(教材原句)Curiosity drove Wang Peng inside.

　　王鹏受到好奇心的驱使，走了进去。

　　(鲜活例句)Curiosity is part of the children's nature.

好奇心是儿童天性的一部分。