阅读理解。 Daban town is famous for girls and windmills (风车), while Loulan is a myth (神话) in the desert. From Daban, we move to another ancient city, Loulan. Two thousand years ago, beside the beautiful and rich Luobu Lake, there lay Loulan, ancient city on the Silk Road. Businessmen from every country gathered here and there were dancing parties. Everything shows that people in Loulan lived a rich life then. However, two thousand years later, this rich land suddenly disappeared from the map of China. Then it became an area covered with sand and dead tree trunks. Loulan was first 'discovered' by a Swedish man Sven Hedin in 1900. People from America, Britain, Japan and Sweden, all set foot here. Then in the 1930s, a Chinese named Huang Wenbi came to Loulan for the first time. He visited and studied this area and found many relics that were beautifully and carefully made. It is recorded that the ancient city of Loulan was the capital of Loulan Kingdom during the Han and Jin dynasties. In the past century many things have been dug out there including Han Dynasty coins, mirrors and many others from Greece and Rome. All these things show that a lot of business between East and West once took place there. Lying on the northwest of the Lop Nur area, the Loulan Kingdom is now a lifeless area with endless 'forests' of mounds () which aren't easily seen in other parts of the world. Its mystery (神秘) has been attracting so many people from so many countries. 1. The first person to set foot in Loulan in the 20th century is _____. [     ] A. a European B. an American C. an Englishman D. a Japanese 2. Before Loulan disappeared, _____. [     ] A. a lot of business between East and West had taken place there B. people from America and Japan had set foot there C. a lifeless area with lots of mounds could easily be seen there D. Africans had visited the ancient country 3. We can infer from the passage that _____. [     ] A. Loulan was destroyed by the terrible weather there B. wars between dynasties made Loulan disappear C. foreigners came to Loulan and destroyed it D. how Loulan disappeared is still unknown to us 4. What makes so many people visit Loulan Kingdom? [     ] A. The beautiful scenery there. B. Its developed business in the past. C. Its mysterious stories. D. Those buried treasures there.