However, this has not discouraged many researchers and historians who are sure that Atlantis does exist. Hundreds of books have been written on the lost island and there are now and then new ideas about possible locations (地点). Some people think it is really the Greek island of Thera, which was destroyed by a volcano in 1500 BC. Others believe Atlantis was in Turkey, Spain, America or Africa. One 17th­century expert was sure that Atlantis was in the Arctic Ocean. Only one thing is certain: until someone really finds a ruined city somewhere under the sea, the existence of Atlantis will remain a mystery (神秘)．

　　语篇解读：本文讲的是传说中沉没于大西洋的岛屿亚特兰蒂斯的历史。

　　1．According to Plato, Atlantis had been a great and rich nation ________.

　　A．400 years before

　　B．about 1,500 years before

　　C．more than 9,000 years before

　　D．sometime before, but he didn't say when

　　解析：选C　细节理解题。由第二段第二句话可得知答案。

　　2．Atlantis may have existed ________.

　　A．because there are many books about it

　　B．but there is no evidence to prove its existence

　　C．because there is a city under the sea near Greece

　　D．because it was found in Turkey

　　解析：选B　细节理解题。由第三段中的"... there is no evidence (证据) to suggest that Atlantis ever existed."可知答案。

　　3．One new idea about Atlantis' location is that it is ________.

　　A．in France

　　B．in Macao

　　C．in the Atlantic Ocean

　　D．the Greek island of Thera

　　解析：选D　细节理解题。根据第四段中的"Some people think it is really the Greek island of Thera ..."可知答案。

　　Ⅱ.语法填空

Fleming was a poor Scottish farmer. One day while working in a field, he heard a cry for help. He immediately __1__ (throw) his tools away. Following the sound, Fleming came to a deep bog (沼泽), in which a boy was screaming and sinking. Fleming tied a rope around __2__ own waist and the other end __3__ a tree, and walked into the bog. With great effort