Sarah and Lily are sisters. Sarah is fifteen and Lily is eight. This summer their parents go to visit their friends in another city. So now only Sarah and Lily are at home.

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One day when Sarah was cooking in the kitchen, Lily played in the hall. Suddenly Sarah heard something heavy falling to the floor with a big bang. She hurried to the hall. The whole bookcase just fell down, with books scattering all around. (来源：英语美食指南 http://food.englishcn.com)

  (来源：英语美食指南 http://food.englishcn.com)

“Oh, no! Who give you the green light to touch that!” Sarah shouted! (来源：英语资料下载 http://download.englishcn.com)

  (来源：EnglishCN英语博客基地)

“Green light? I don’t touch it with green light. I touch it with my hand!” Lily said seriously. (来源：英语聊天室 http://chat.EnglishCN.com)

  (来源：英语麦当劳－英语快餐EnglishCN.com)

“Don’t blow smoke!” (来源：专业英语学习网站 http://www.EnglishCN.com)

  (来源：英语资料下载 http://download.englishcn.com)

“I don’t blow smoke. But you do. See the kitchen.” Lily said quite earnestly. (来源：英语论坛 http://bbs.englishcn.com)

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The kitchen was smoking!

“My pancakes! I would go bananas!” Sarah cried.

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Notes: (来源：最老牌的英语学习网站 EnglishCN.com)

Give somebody green light:  give somebody permission to do something (来源：英语聊天室 http://chat.EnglishCN.com)

Blow smoke:  to speak idly, misleadingly, or boastfully (来源：英语论坛 http://bbs.englishcn.com)

Go bananas:  acting crazily or silly

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