题目内容：

    Deep in the middle of Sri Lanka, a massive column of rock reaches out from the green tropical forest. It is 660 feet tall and features frescoes (壁画), graffiti, and landscaped gardens.

The rock is known as Sigiriya and holds a special place in the island's cultural history.

It was established as the stronghold of a king over 1,500 years ago, and today the Sigiriya complex stands as one of the earliest preserved examples of ancient urban planning.

Located in the Central Province, the column of rock is somewhat central to the country. The rock is known as Sihagiri, meaning "Lion Rock", a nod to the giant animal carved from stone which greeted visitors at the entrance.

In 476 BC. King Dhatusena ruled over Sri Lanka. One of his illegal sons, Kashyapa, wanted the throne (王位). Kashyapa overthrew Dhatusena and drove his brother Moggallana to Southern India. Kashyapa crowned himself king in 477 BC.

King Kashyapa chose Sigiriya as his palace because its position was an advantage to the defensive stronghold, offering fantastic 360-degree views. Plans to build a city quickly unfolded and after several years, the Sigiriya complex had become a business center for the new King.

Sigiriya was both a palace and a fortress (堡垒); the overall complex featured five gates and measured just under 3 km by just over 1 km. The site plan consisted of a fort，an upper palace on the top of the rock,and lower palaces at ground level. The king also constructed gardens throughout，and for protection a river with walls surrounded the complex.

Frescoes decorate the western side of the rock, along with the mirror wall, a brick face covered in a highly-polished white plaster. When new, the wall was said to be able to produce Reflections.

Over time the Mirror Wall became a graffiti board, covered in verses written by visitors. Known as "Sigiri Graffiti", some of the messages date to the 8th century CE.

1.It is implied in the passage that Sigiriya was built to ______________.

A.preserve the culture of Sri Lanka B.prove the ancient urban planning

C.keep the King from being attacked D.protect the green tropical forest

2.According to the passage, some visitors would _________.

A.have a reflection before the Mirror Wall

B.leave comments on the Mirror Wall

C.draw beautiful paintings of girls on the wall

D.be lost in thought before the Mirror Wall

3.What do we know about Sigiriya?

A.Its entrance is carved like a lion. B.Its gardens are at ground level.

C.Its western side is a mirror. D.Its palaces are on the top of the rock.

4.What is the best title of the passage?

A.The giant lions in Sri Lanka. B.The pearl of the Indian Ocean.

C.The Lion Rock of Sri Lanka. D.The mirror wall in a rock.