pair与a pair of有啥区别.The teacher asks his students to practice

pair与a pair of有啥区别.The teacher asks his students to practice The teacher asks his students to practice English in _______ a pair of与pair的区别 jim wants to buy a pair of basketball shoes,so he asks his f a new pair of sock s与a pair of new sock s有区别吗 Do you know the teacher ( )a pair of a glass The teacher with a pair of glasses gives lessons to us every The teacher came in ____ a pair of glasses a pair of 与 a piece of 的区别 a couple of与a pair of的区别 a set of与a pair of用法的区别 A pair of good shoes ,a good pair of shoes 有什么区别啊