3. One reason Crystal has become so famous is that he is very quick thinking, and is often able to come up with new jokes about the people and things around him.

　　克里斯托之所以如此出名, 原因之一就是他思维非常敏捷, 常常能就身边的人或事即兴编排笑话。 【填一填➡激活思维】仿写句子。 ①____ ______ he came late __ ____ he was caught in the traffic

　　jam.

　　他来晚的原因是他遭遇了交通堵塞。 ②____ ______ Americans are obsessed with staying healthy __

　　____ it is much cheaper than getting sick.

　　美国人对健康过于关注的一个原因是, 保持健康比生病要便 宜得多。 The reason is that One reason is that 【记一记➡构建知识】 (1)The reason why. . . is that. . . 是固定句式, why引导定语从句, 也可用for which或省略; that引导的表语从句说明主语reason的具体内容。 (2)当主语是this或that时, 常由because/why引导表语从句。 (3)why在句中是关系副词, 引导定语从句, 修饰先行词reason, 同时它在定语从句中作状语, 此时why=for which, 但当关系词在定语从句中作主语或宾语时, 要用关系代词that或which。 *That is why she is so happy.

　　那就是她如此高兴的原因。 *This is because the bill is not much loved.

　　这是因为这一法案并不很招人喜欢。 *I know the reason why he was angry.

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