【正文】 dn39。t have more children. Cloning would enable such a couple to have a second child, perhaps a younger twin to the child they already have. Many couples have difficulty having children, and sometimes it is impossible for couples to have children because they are infertile. Cloning would allow these couples to have children. It is hard to tell someone that they cannot use cloning to have children when no other possible ways to have children are available. This is one reason why it is difficult to decide whether cloning is moral or not. The following are some of the reasons why cloning should be allowed. Through cloning, research can progress. We possibly can learn more about cell. We may develop technology to allow easier geic testing and fixing problems such as spinal cord injuries, cancer, and many more. Cloning ans for an transplants (移植 ) is one of the major practical reasons that cloning should be allowed. There is always a high demand for ans. Some argue for the cloning of humans to create extra body parts. Others talk of just wanting to clone an an to replace a faulty an. Rejuvenation (恢復(fù)青春 ) is also a key argument for advocates (提倡 ) of cloning. Some scientists believe that injecting cloned healthy heart cells into damaged heart tissue will lead to healing of the heart. By bining the technology for cloning and the technology for growing human stem cells, conditions like Alzheimer39。s, Parkinson39。s, and some other ageing disease may be curable. The possibilities are endless and may be left undiscovered if human cloning is forbidden. 13. The underlined word “ infertile” in Para. 1 means “ ____” . A. unable to have children B. too poor to grow crops C. poor in pregnant knowledge D. unable to afford to bring up children 14. How many reasons does the writer give in this passage about why cloning should be allowed? A. 2. B. 3. C. 4. D. 5. 15. Which of the following statements is NOT true? A. Cloning babies for infertile couples is moral. B. Through cloning, research work in cells can make great progress. C. Cloning cells can make some diseases concerning ageing curable. D. Cloning technology may help improve medical technology. 16. From the passage, we can know the writer39。s attitude toward human cloning is ____. A. negative B. supportive C. uninterested D. opposing E BARCELONA (Reuters) — “ Galactic Suite” , the first hotel planned in space, expects to open for business in 2021 and would allow guests to travel around the world in 80 minutes. Its architects say the space hotel will be the most expensive in the galaxy, costing $4 million for a threeday stay. During that time guests would see the sun rise 15 times a day and use Velcro suits to crawl (爬 ) around their pod (分離艙 ) rooms by sticking themselves to the walls like Spiderman. Company director Xavier Claramunt says the threebedroom hotel39。s joined up pod structure, which makes it look like a model of molecules, was based on the fact that each pod room had to fit inside a rocket to be taken into space. “ It39。s the bathrooms in zero gravity that are the biggest challenge,” says Claramunt. “ How to provide enough space for more private activities of the guests is not easy.” But they may have solved the issue of how to take a shower in weightlessness — the guests will enter a spa room in which bubbles of water will float around. When guests are not admiring the view from the windows of their pod rooms39。， they will take part in scientific experiments on space travel. “ There is fear associated with going into space,” said Claramunt. “ That39。s why the shuttle rocket will remain fixed to the space hotel for the duration of the guests39。 stay, so they know they can get home again.” “ But,” says Claramunt, “ I39。m hopeful that the impact of seeing the earth from a distance will stimulate (激發(fā) ) the guests39。 urge to value and protect our pla.” 17. Which of the following might be the best title for this passage? A. “ Galactic Suite” : the first hotel planned in space B. Fly me to the moon: space hotel sees 2021 opening C. Fly to the moon: a greatest dream for humans D. Building a space hotel: a dream or a reality? 18. Wh