题目内容：

假定你是高中生李华，有感于校园中存在的随意涂写和乱丢垃圾的行为，请用英文给校长写一封信，100个词左右。1. 说明写信的目的。2.对这些行为提出批评。3.提出建议。

提示：随意涂写scribble（n.& v.）乱丢垃圾litter（n.&v.）批评 criticize(v.)

Dear Mr. Headmaster，

I am Li Hua, a student fromClass One,SeniorTwo._____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Yours faithfully,

Li Hua