One possible version：
My_fellow_students,
As_head_of_the_group,I_would_like_to_report_to_you_on_the_event.
Last Friday,the Students' Union organized a cleanup project in Zhongshan park,for the purpose
of raising the environmental awareness of the public.At around 4 p．m.,35 students went to the park
to pick up the litter.
Actually,we did a wonderful job.When we were collecting the litter,many people came to our
help,showing considerable appreciation and support.But our work still left something to be desired.
For one thing,since we started late in the afternoon,it was not long enough to attract enough people.
For another,some people passed by because they even didn't know what we were doing.Otherwise,
our project could have been much better and more effective.
Next time if we have similar activities,I think we should try to start earlier.And also,we can put up
some posters to tell people what we are doing and call their attention to environmental protection.
Thank_you.
答案不唯一
