假如你是李華，你的外國(guó)筆友Jim對(duì)中國(guó)長(zhǎng)城很感興趣。請(qǐng)你給他根據(jù)以下要點(diǎn)給他寫一封信，簡(jiǎn)要介紹長(zhǎng)城的一些情況。
歷史：有兩千多年的歷史。
特點(diǎn)：世界上最長(zhǎng)的城墻，長(zhǎng)6000多千米；建筑材料主要為石頭、磚頭，修建工作都是人工進(jìn)行；主要用于防御外來(lái)入侵者（invader），沿墻每隔幾百米就有烽火臺(tái)（watchtower）。
現(xiàn)狀：世界著名旅游景點(diǎn)之一，每年吸引許多國(guó)內(nèi)外游客到長(zhǎng)城觀光旅游。
（1）注意：詞數(shù)80左右；
（2）可適當(dāng)增加細(xì)節(jié)，以使行文連貫；
（3）信的開(kāi)頭和結(jié)尾已給出，不計(jì)入總詞數(shù)。
Dear Jim，
    Learning that you show great interest in the Great Wall，I'm writing to share some information with you.
______________
Yours sincerely，
Li Hua

【考點(diǎn)】書信類．

【答案】Dear Jim，
Learning that you show great interest in the Great Wall，I'm writing to share some information with you.
The Great Wall，which is more than 6，000 kilometers long，is the longest wall in the world.With a history of over 2，000 years，it was made of stones and bricks.Besides，almost all the construction was done by hand without any machine.As the wall was built to defend the country against foreign invaders，there were watchtowers every few hundred meters along the wall.Now，the Great wall is one of the most famous places of interest in China，attracting many tourists from home and abroad every year.
As is described above，I believe it is worthwhile to pay a visit to the Great Wall.
Yours，
Li hua