China has many big things. Now it has the world's largest building. It opened this week in Chengdu. It is 500 meters long, 400 meters wide and 100 meters high. Twenty Sydney Opera Houses（悉尼歌剧院）can go inside. It is three times bigger than the Pentagon（五角大楼）. Thousands of workers built it.

The building is like a small city. There are many shops, a big cinema and an ice rink（溜冰场）. There are also offices, hotels and a water park. People will come from all over the world and make Chengdu famous. Millions of people live in the city. It is an important place for business.

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1.The building opened this week in ______.

A Shanghai

B Chengdu

C Beijing

D Guangzhou

解析：选B。B 细节理解题。根据第1段第3句It opened this week in Chengdu.可知，故选B。

2.The building is _____ meters high.

A 500

B 400

C 300

D 100

解析：选D。D 细节理解题。根据第1段第4句It is …and 100 meters high.可知，故选D。

3.Which is NOT in the building?

A Sydney Opera House.

B Shops.

C Cinema.

D Water park.

解析：选A。A 内容理解题。Sydney Opera House（悉尼歌剧院）在澳大利亚，不在成都，故选A。

4.The underlined word “city” in the passage refers（指代）to______.

A Chengdu

B the building

C Shanghai

D Sichuan

解析：选B。B 语义理解题。根据第2段第一句The building is like a small city.可知，故选B。

5.What’s the best title for the passage?

A The largest building in the world

B The largest building in China

C A famous city in China

D A beautiful city in China

解析：选A。A 文章标题题。文章主要介绍坐落于中国成都的世界最大建筑，所以A项契合文章内容，故选A。