PSAs are often placed _____ free, and are ______ to educate people about health, safety, or any other issue which affects public welfare.

A．for, intend                                     B．for, intended

C．of, to intend                       D．in, intending

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你的朋友Tom 打算來中國的云南旅游，請你根據(jù)以下提示，給他寫一封信，并給出一些旅游建議。

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Dear Tom, ___________________________________________________________________

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The company wishes to ______ its new factory beside the river．

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In the complex and technological society ________ the United States has become，each member must fulfill a number of personal and occupational roles．

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I’m just wondering _____ I first met Doctor Zhang.

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The design ____ children a lot．They all like it.

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