假如你是兰州市的一名高中生李华，你在美国的笔友John一直梦想着来中国体验中国的传统文化。正好这段时间兰州正在举办世界园艺博览会（International Horticultural Exposition），请你给他写一封信，邀请他来兰州欣赏园艺，顺便感受一下中国各地的风俗文化。

信件包括以下要点：1. 世界园艺博览会从4月29日持续到10月16日；

2. 可欣赏世界各地的园林艺术；

3. 有机会认识和结交世界各地的朋友。

注意：1. 词数100字左右

2. 可以适当添加细节以是行文连贯

3. 开头和结尾已给出，不计入总词数。

Dear John,

I’m writing to invite you to Lanzhou, China. ________________________________

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Yours sincerely,

Li Hua

This is the deepest swimming pool _____ I have ever seen in China.

A. which B. what C. where D. that

The old man was deeply struck by the beautiful light show ______ he came to the city.

A. the first time B. for the first time

C. at the first time D. the first time when

What do you think of the materials ______ these clothes are made?

A. of which B. with which C. into which D. up of which

After living in Paris for 50 years, he returned to the small town ______ he grew up as a child.

A. which B. that C. when D. where

He was a warm-hearted and hard working man, and________ by his classmates.

A. high thought of B. highly thought of

C. badly thought of D. was well thought

She was so amused with the magician’s trick that she _____ laughing.

A. burst into B. broke into C. burst out D. broke out

After World War Two, many of the cities across western European countries _________.

A. lied in ruins B. lay in ruin

C. lay in ruins D. laid in ruins

His ____ of life has changed a lot since the experience he had in Africa three years ago.

A. sight B. attitude C. view D. altitude

Although working mothers are very busy , they still ______ a lot of time to their children.

A. determine B. devote C. provide D. spend