朗读下面短文，体会、领悟加黑部分的时态、语态。
I am Li Fan, chairman of the Students' Union. I am writing① to draw your attention to some improper behaviour in our campus: littering and scribbling. It has been making② our school dirty and unpleasant. I always feel ashamed whenever I see③ this. It is clearly not appropriate for a student to litter and scribble about. Last week, the Students' Union held④ a meeting to seek some solutions to these problems. We were having⑤ a heated discussion when our headmaster came and joined us. After the meeting, the headmaster said that the school had made⑥ efforts to improve this situation and more dustbins would be placed⑦ around. Recently, the Students' Union has set up⑧ specific rules against such behaviour. At the same time, all of us should develop good habits and behave ourselves. We believe that, with the joint efforts of both teachers and students, our school will become⑨ a more enjoyable place in the near future.
