Dear Mr bule：
Thank you very much for our class to do last week week on healthy eating,[非常感谢你上周给我们周班做了关于健康饮食的讲座] i have some questions to ask you[我有一些问题想向你请教]Recently, many of my classmates in class can not concentrate[最近班里很多同学上课不能集中精神]I don't know what the reason[我不知道是什么原因]hope you can give me some advice and help me to analyse some of the reasons[我希望你给我一些建议并帮助我分析一些原因]Thank you .Hope you'll have the time to give us a lecture[希望你下次有时间在来给我们做讲座]