One billion people in the world are short of water. How can this problem be solved? One possibility that scientists are considering is pulling icebergs from either the North Pole or the South Pole to parts of the world with a water shortage (短缺). Although many questions must be answered before such a project could be tried, engineers, mathematicians and glaciologists (冰川学家) consider the iceberg as a future source of water. Saudi Arabia (沙特阿拉伯) is particularly interested in this project because it has a great water shortage. Scientists estimate that it would take 128 days to transport a large iceberg (about 1/2 miles square) to Saudi Arabia. Yet the iceberg would be completely melted by the 104th day. Therefore, insulation would be essential, but how to insulate the iceberg remains an unsolved problem.The problems in transporting an iceberg are numerous. The first problem is choosing the iceberg to pull. The icebergs that form in the North Pole are quite difficult to handle because of their shape. Only a small portion extends (延伸) above the water – most of the iceberg is below the surface, which would make it difficult to pull. South Pole icebergs, on the other hand, are flat and float like table tops; thus, they would be much easier to move.How can a 200 million-ton iceberg be moved? No ship is strong enough to pull such enormous weight through the water. Perhaps several ships could be used. Attaching ropes to an iceberg this size is also an enormous problem. Engineers think that large nails or long metal rods (杆) could be driven into the ice. What would happen if the iceberg breaks into several pieces during the pulling? How could it be pulled through stormy waters? Furthermore, once the iceberg reached its destination (目的地), very few ports would be deep enough to store it.All of these problems must be solved before icebergs can become a reasonable source of water. Yet scientists think that it will be possible to transport them in the near future. Each year, enough icebergs form to supply the whole world with fresh water for a full year. In addition, icebergs are free and non-polluting. As a solution to the world's water problems, icebergs may be a workable possibility.(1) (单选题)According to the passage, which of the following statements about using icebergs to solve water shortage is NOT true?A. There are difficult engineering problems to be solved.B. The water in most ports is too shallow for big icebergs.C. Saudi Arabia is the only country interested in the project.D. It's hard to pull an iceberg which is largely below the water surface.(2) (单选题)Which of the following is one of the difficulties to transport icebergs?A. Not enough ships.B. Terrible weather in the ocean.C. Too much salt in the ocean water.D. Too many different shapes of icebergs.(3) (单选题)Icebergs from the South Pole probably are easier to transport because ___________.A. they are easier to pull.B. they do not melt very easily.C. they are all in small portions.D. they stand above the water surface.(4) (单选题)From the passage, the word "insulation" in Paragraph 1 can be best explained as ______________.A. separating the iceberg from heat.B. taking the iceberg away from the ocean.C. protecting the iceberg from being broken.D. shortening the distance from the destination.(5) (单选题)From the passage we can infer that ________________.A. the chances of using icebergs as a source of water are very small.B. using icebergs as a source of water may cause environmental problem.C. it is just a fantasy for humans to transport icebergs to solve the water shortage.D. scientists are optimistic about the possibility of using icebergs as a water source.