2. Which step should be firstly taken when you try door-knocking? 回答　　A. Have people knock their own blocks. 　　B. Wear an official name tag. 　　C. Leave a door hanger.

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2. Which step should be firstly taken when you try door-knocking?
回答

　　A. Have people knock their own blocks.

　　B. Wear an official name tag.

　　C. Leave a door hanger.

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河北科技大学英语2(专升本)