1．boost vt.　　　　　　 促进；使增加

　　2．stroll n. 漫步；闲逛

　　3．susceptibility n. 敏感性；易感性

　　4．hamper vt. 妨碍；阻止

　　5．triple vt. (使某物)增至三倍

　　1．Why do we often wash our hands in order not to catch a cold?

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　　2．How can cold and flu spread?

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　　【答案】　1.Because cold and flu can spread easily through touch and we often touch something with our hands.　2.By touch.

Section Ⅰ　Warm­up & Super Athletes-

Preparing

　　根据提示写出下列单词

　　1．____________ vi.　　 循环

　　2．____________ vi. 用泵抽出(注入)

　　3．____________ vt. 消化

　　4____________ vi. 交换

　　5．____________ vt. 滥用

6．____________ vt. 容忍