I believe the world is ______ you think it is. So smile at the world and it will smile back.

A. what B. how C. that D. which

A

【解析】

試題分析：考查表語從句的連接詞。表語從句中it is之后缺少的是表語，故選擇A。句意為：你認(rèn)為這個(gè)世界是什么樣，就是什么樣。

考點(diǎn)：考查表語從句

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