How about buy one and get one free?买一送一怎么样?在大学阶段 是否有语法错误口语中是否可用

I want to buy a pair of shoes.-------How about this A.one B.pair How about that one? How about buy one and get one free?买一送一怎么样?在大学阶段 是否有语法错误口语中是否可用 翻译：How about this one how about that one overthere? How about the green one how about this one和 what about this one? where to buy jordan shoeswhere can we buy jordan old classic shoes?some one introduce one website http://www.69sport.com/category.php?id=239 ,how about the quality?It is not authetic shoes? How about that one?同义句 How about this blue one?的意思 how about this red one的意思 How about this blue one?的意思 How about this one?同义句 how about this one?搜汉语 how about this one?good.()()are they? How about another one的中文 How many p_____ did you buy? About 2 kilos. how about going to an estate