1 . Shackleton and a team tried to sail to another island to find help. Look at the picture below and discuss the challenges you think they faced.

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2 . 选择身边人存在的一种坏习惯，说一说它可能导致的危害。
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3 . 根据课文标题 (JOHN SNOW DEFEATS “KING CHOLERA”)和以下图片推测文章将如何介绍约翰·斯诺战胜“霍乱王”的过程。

     

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