feel bored, 不是boring. 感到无聊和令人无聊是有区别的. a little 可以改成kind of 更口语化,以前看过一篇报道,忘了是哪里了,说美国人喜欢那样说,比a little/a bit 常用,地道.
Jack is a nice guy with more patience with his students. Sorry I do not want to write English any more because I am tired.
Learning English is time-consuming activity. In my opinion, effective communition and professional knowledge about the products you sell are just the most important.