[句型点拨]that引导表语从句。

　　[佳句赏析]One of them is that we can find a variety of topics, such as science, culture and history.

　　其中之一就是我们能找到各种话题，比如科学、文化和历史。

　　1．Everybody has to eat, but do you eat a healthy diet? (P9)

　　每个人都得吃饭，但是你的饮食健康吗？

　　★diet n．日常饮食 vi. 节食

　　be on a diet/go on a diet　　　　控制饮食；节食

　　put somebody on a diet 使某人节食

　　①She is on a diet to lose weight.

　　为了减肥，她正在节食。

　　②The doctor put me on a very strict diet.

　　医生严格限制我的饮食。

　　③She keeps dieting (diet) all the time, but she never seems to lose any weight.

　　她一直在节食，但是体重看起来没有减轻。

　　2．What will happen to you if you don't eat a balanced diet? (P9)

　　你如果没有均衡的饮食将会怎么样？

　　★balanced adj. 平衡的

　　(1)keep a balanced diet　 保持饮食均衡

　　(2)balance n. 天平；平衡

　　　　　　vt. 权衡

　　keep the balance of nature 保持生态平衡

　　keep a balance between A and B保持A与B的平衡

　　keep one's balance 保持平衡

　　lose one's balance (＝be out of balance)

　　 失去平衡

balance sth. against sth. 权衡；斟酌；比较......和......