Have you ever visited the Forbidden City？ This year is its 600^th birthday． It is the world's largest palace and has over 17 million visitors every year． But if we traveled back to the past， we probably wouldn't be allowed inside．

    In the past， all buildings in Beijing were low except the Forbidden City． From outside，ordinary （普通的） people could only imagine what it looked like inside．

    The Forbidden City takes up 720，000 square meters in the heart of Beijing． It was built from 1406 to 1420 by the third emperor of the Ming Dynasty， the Yongle Emperor． After that， it was the living and working place of 14 emperors of the Ming Dynasty and 10 emperors of the Qing Dynasty．

    During those times， the Forbidden City was where the country's supreme power （最高权力） could be found． Emperors were born， lived， fought and died there． It saw the highs and lows of the Ming and Qing dynasties， and it plays a very important part in Chinese history．

    The cultural relics （遗物） and documents （文件） in the palace show how the royal families lived． They are still used today for historical research， as well as inspiration for literature （文学） and entertainment （娱乐）．

    In 1987， the Forbidden City was listed as a UNESCO World Heritage site．For world leaders who visit China， it has become a must﹣see．In 2017，when US President Donald Trump paid a state visit to China，President Xi Jinping and his wife Peng Liyuan welcomed Trump and his wife there．

（1）The Forbidden City was built　　．

A． in 1406

B． in 1420

C． from 1406 to 1420

（2）Why does the Forbidden City play an important role in Chinese history？　　

A． Because it saw the highs and lows of the Ming and Qing dynasties．

B． Because it was the place where the emperors were born and grew up．

C． Because it is the place people want to visit most．

（3）　　can show how the royal families lived in the Forbidden City．

A． The pictures of the Forbidden City

B． The cultural relics and the documents in the palace

C． The buildings in Beijing

（4）What does the underlined word "must﹣see" mean in Chinese？　　

A．一定看见

B．一定明白

C．必看之地

（5）What does the passage mainly talk about？　　

A． The Forbidden City．

B． The emperors of the Ming and Qing dynasties．

C． The life of royal families．