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(单选题)To whom is the passage addressed? ( ) (单选题)Which type of writing does the passage belong to? ( ) (单选题)What may the author discuss later? ( ) (单选题)What can be inferred from paragraph 4? ( ) (单选题)According to the article, which of the following is the righ (单选题)Why should businessmen make use of the sites that screen sup (单选题)What is the target reader of this article? ( ) (单选题)What’s the tone of the passage? ( ) (单选题)What can be inferred from passage? ( ) (单选题)According to the passage, what is TRUE about Guan xi in Chin