The Palace Museum，known as the Forbidden City，was the imperial （帝王的） palace of the Ming and Qing Dynasties．In the early 15th century，largesize construction caused 100，000common people to lead a hard life．The construction took 14years and was finished in 1420．In the following year，the capital of Ming Dynasty was moved from Nanjing to Beijing．Twentyfour emperors of the Ming and Qing Dynasties ruled from the Forbidden City．The last dynasty fell in 1911，but Emperor Puyi still lived in the inner court．It was not until 1925that the complex buildings were changed into a museum．Since then，the Palace has been opened to the public．
The Palace Museum is rectangular （长方形） in shape，about 960meters long from north to south and 750meters wide from west to east．There is a 10meterhigh wall，encircled by a 52meterwide moat （护城河）．In the Ming Dynasty，the wood needed for the building was brought mostly from Sichuan and Hunan Province，while in the Qing Dynasty，it was cut from the northeast of China．Most of the stones were mined from the suburban （郊外的） district of Fangshan and other districts．Construction of the Forbidden City brought huge hardship to the laboring people．
The palace is the largest piece of ancient Chinese architecture （建筑） still standing．Some of the buildings were damaged by lightening and rebuilt in the Ming and Qing Dynasties．The palace has been expanded several times，but the original design was preserved．After liberation，some costly renovations （翻新） were done and the Palace Museum is listed as one of the important historical sites under special preservation by the Chinese government．

(1) What is the main idea of Paragraph 1？ ______

A. The origin of the name"the Forbidden City"．

B. The Forbidden City and emperors．

C. The open to the public of the Forbidden City．

D. The period of the construction of the Forbidden City．

(2) The Forbidden City began to be constructed in ______ ．

A. 1911

B. 1421

C. 1406

D. 1420

(3) What can we learn from Paragraph 2？ ______

A. The emperors'cruelty brought the Forbidden City into the world．

B. The processing of constructing the Forbidden City needed wood and stones from all over the country．

C. The Forbidden City is the largest piece of ancient Chinese architecture still standing．

D. The Forbidden City is about 720，000 square meters．

(4) This passage most probably comes from a book on ______ ．

A. customs and habits

B. dynasties and emperors

C. history and emperors

D. architecture and history．