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28. I've ___ the product catalogue and decided to buy this table A.found out B.closed down C.looked through D.lived on 30.____ respect to people of seniority is a tradition of VN A.Giving B.Paying C.Taking D.Using 31. As far as i know, the ___ problem is still among ethnic people in some mountainous regions A.literate B.illiterate C.literature D.illiterature

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