假定你是李华，暑假即将来临，你的老师Tony准备布置线上课程，帮助同学利用假期学习。你认为线上课程存在问题，请你给Tony老师写一封邮件，内容包括：
（1）说明问题；
（2）提出建议。
注意：
（1）写作词数应为80左右；
（2）请按如下格式在答题卡的相应位置作答。
参考词汇：线上课程online courses
Dear Tony，
    I'm your student，Li Hua.______
Yours sincerely，
Li Hua

【考点】书信类．

【答案】Dear Tony，
I'm your student，Li Hua.I'm writing to share with you my idea about the online courses to be assigned.
Personally，well-meant as the courses are，some students don't take them seriously.In that case，their learning efficiency won't be guaranteed.Worse still，too much time spent learning online is likely to harm their physical and mental health.Hence，to hold the students' attention and ensure their health，I strongly recommend more interesting courses and a shortened duration.
I sincerely hope my advice is of practical use to you.Looking forward to your early reply.
Yours sincerely，
Li Hua