单选题

　　1.[阅读选择]In 1841,a book was published which astonished the world. It was called "ncidents of Travel in Central America,Chiapas and Yucatan"。 The author John Loud Stephens had just returned from a long,difficult and dangerous journey through the thick rain forest of southern Mexico and Guatemala. He had once been there with Frederick Catherwood,an architect and artist,to search for the remains of a lost civilization known as the Mayas（玛雅）.Very little was known about the Mayas at that time, but Catherwood's drawing in the book showed incredible cities with temples,pyramids and other buildings as impressive as those of their northern neighbors,the Aztecs. These cities,however,were deserted. The inhabitants（居民） had disappeared almost a thousand years before.

　　Stephen's book astonished the world because ______.

　　A.it was the first time people heard about Mayas.

　　B.the Mayas were excellent builders and farmers.

　　C.he had experienced so many difficulties to find this lost civilization.

　　D.it described that the Mayas used to be an advanced civilization.