假如你是李华，你暑假去长城旅游，看到了长城受到自然和人为的破坏，游客们在长城上刻画，乱丢垃圾，为此你感到痛心。因此你给当地政府写信，希望政府能采取措施保护这宝贵的文化遗产。
内容包括：1.长城受到自然因素及人为因素破坏；2.保护文化遗产的重要性；3.你的建议（至少三点）
写作要求：要点齐全，可适当发挥；词数为80-100。
参考词汇：文化遗产 cultural heritage 刻画 carve
Dear Sir，
    I travelled to the Great Wall in my summer vacation.____________
    I would appreciate it if my suggestions were accepted.
Sincerely yours，
Li Hua

【考点】提纲作文；旅游与交通．

【答案】Dear Sir，
I travelled to the Great Wall in my summer vacation.The scenery there is really beautiful，but it is suffering from damages due to natural forces such as frequent sandstorms.What's worse，some tourists even carve their names on the walls，making me heartbroken.
I strongly feel it significant to protect cultural heritage.For one thing，cultural heritage，which is the witness to the historical development，is an important basis for historical research.For another，it is likely to provide a source of tourism income，if maintained well.
So I hope the authorities can take measures to protect the Great Wall，such as raising people's awareness by handing out leaflets on preserving cultural heritage.Besides，strict regulations should be made to fine spoilers.Planting more trees is also a good way to prevent sandstorms.
I would appreciate it if my suggestions were accepted.
Sincerely yours，
Li Hua