I“ve tried very hard to improve my English .But by no means-

A the teacher is not satisfied B is the teacher not satisfied AB都是说老师不满意,只是B倒装了.C the teacher is satisfied 而C则是老师满意 D is I“ve tried very hard to improve D是说我很努力地想要进步 了解之后你所必须知道的是 by no means是什么意思啊.是指绝不,一点也不.而but表示转折,双重否定表肯定 所以答案AB都排除了,D根据句意也是不可能的,则选择C