题目内容：

阅读下面短文，从短文后各题所给的四个选项（A、B、C和D）中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。

The 600-year-old Forbidden City is the world’s largest palace. It _______ more than 17 million _______ every year. If we were to travel back to the past, this _______ palace would be a _______ to us with a lot remaining to be discovered.

It was when all _______ in Beijing were low except for the Forbidden City, which was surrounded by high _______ and a wide moat (护城河). After _______ the golden roof (屋顶) from the outside, people could only _______ what it looked like inside.

_______ an area of 720,000 square meters in the heart of Beijing, the Forbidden City was built from 1406 to 1420 by the third  ________ of the Ming Dynasty. In the past, the Forbidden City was where the highest ________ of the country laid. Emperors were born, lived, fought and ________there. Various ________ events happened there. It saw the ________ and downs of the Ming and Qing dynasties, as well as how feudal monarchy (封建帝制) ________ came to an end in China.

The lives of the royal families were ________ through many documents (文件). They ________a large amount of valuable material for today’s historical ________, as well as inspiration for literature and entertainment.

In 1987, the Forbidden City was ________ as a UNESCO World Heritage site. For world leaders who visit China, it is a must-see tourist ________. When they pay a state visit to China, our top leaders may show them around there.

1.A.relieves B.receives C.guides D.sells

2.A.visitors B.students C.teachers D.citizens

3.A.red B.small C.green D.huge

4.A.dream B.hope C.wonder D.mystery

5.A.museums B.rooms C.buildings D.houses

6.A.towers B.walls C.trees D.hills

7.A.looking at B.giving up C.setting down D.jumping at

8.A.tell B.think C.imagine D.admire

9.A.Owning B.Covering C.Having D.Taking

10.A.emperor B.designer C.painter D.soldier

11.A.altitude B.power C.figure D.position

12.A.studied B.worked C.gathered D.died

13.A.happy B.sad C.historical D.national

14.A.above B.best C.worst D.ups

15.A.finally B.quickly C.gradually D.suddenly

16.A.recorded B.settled C.connected D.copied

17.A.grasp B.ignore C.write D.provide

18.A.background B.research C.exam D.survey

19.A.treated B.remembered C.listed D.honored

20.A.palace B.scenery C.attraction D.place