阅读理解。 If, for some reason, you had 2,010 empty plastic bottles, what would you do? You'd probably sell them cheaply, right? But Xia Yu collected 2,010 bottles and built a boat with them. As you read this, Xia is, in fact, on a river somewhere in Anhui, slowly going towards his destination: the Expo Garden in Shanghai. 2,010 plastic bottles were to celebrate the Expo 2010 Shanghai. On the opening day of the Expo, Xia, together with five friends, went on a 1,500 km journey from Xiangtan to the Expo Garden, in spite of the doubt whether they'll make it.After all, the boat they are on can hardly be called a boat. It cost only 2,000 yuan to build in a month. What's keeping Xia going is a major cause behind the trip. 'We are examining water pollution through our journey and trying to promote a lowcarbon lifestyle. Before we started, no one believed we could sail the boat to the Dongting Lake. But we made it.' But as they expected, the journey has not always been smooth. Of the six from Xiangtan, four gave up. As of press time (截至发稿时), only Xia and his friend Huang Ying were on the boat.Huang suffered from a disease when they reached Jiujiang, Jiangxi Province.Xia said,'There are so many things that can stop us from making it to Shanghai, like the weather, health, and sometimes swift river water.' 'The boat was produced in a factory according to our design, and perhaps it's not in a very good condition. But,' Xia  said, 'we are wearing life jackets.' 'Some boats passing by offered help.' What is more of a reward for Xia and Huang is that the Yangtze River turned out much cleaner than they had expected. Although Xia and Huang are uncertain about the journey ahead, they are 'quite happy' with what they have already achieved. 'After all, it's not the destination that counts. It's always the course that matters the most.' 1. Xia Yu doubts the success of the journey because of _____. A. such a long journey on the river B. the poor boat and the bad weather C. few people taking part in the journey D. the seriously polluted river in some parts 2. Which of the following is NOT the purpose of the journey? A. To examine water pollution. B. To celebrate the Expo 2010 Shanghai. C. To win a race on the water. D. To promote a lowcarbon lifestyle. 3. From the text we know that _____. A. they stay on the boat at night B. three people gave up due to their bad health C. Xia Yu and his mate have arrived in Shanghai D. Huang suffered from a disease on the journey 4. The last paragraph tells us Xia Yu and Huang Ying _____. A. pay more attention to the process B. are sure to arrive at the destination C. helped turn the Yangtze River cleaner D. are happy because of their final success