problem trouble matter 能否加S?
problem trouble matter 能否加S?
trouble matter problem question
matter problem trouble wrong的区别
trouble problem question matter 的区别
Questionquestion problem matter与trouble的区别
problem,trouble,matter,question的区别
matter.trouble.problem.difficulty可数,不可数
question problem matter trouble bother worry 哪些有复数形式
have problems/trouble doing sth 中problem为什么要加s
problem?matter?
No problem为什么problem不加s?
trouble、matter、wrong、problem四者区别.顺便问句话:She asked him what wa