II.阅读理解。认真阅读下列两篇短文，每篇短文后有5个问题，根据短文的内容从A、B、 C、D四个选项中选出一个最佳答案。错选、多选或未选均无分。(本大题共10小题，每小题2分，共20分)

　　Passage One

　　Charles Dickens’s last novel and his only mystery, The Mystery of Edwin Drood, was left uncompleted when the novelist died, and its possible ending remains a mystery to this day.

　　Is there really a body hidden in the crypt of Cloisterham Cathedral near London? If so, is it the corpse of young engineering student Edwin Drood? Did John Jasper, Drood’s opium-smoking uncle, murder his nephew? Of what significance is the late appearance in the story of Dick Datchery, a mysterious figure who is evidently in disguise?

　　Various suggestions have been made as to how Dickens intended to conclude his mystery,and in 1914 there was even a mock trial with John Jasper as the accused. Writer G. K. Chesterton was the judge, and playwright George Bernard Shaw was the foreman of a jury composed of famous authors and lawyers. The jurors brought in a verdict of guilty and Chesterton promptly fined them all for contempt of court!

　　The most frustrating aspect of forecasting the tale’s conclusion is that it is impossible to prove that any given solution is the one Dickens intended. Even a consultation with the novelist himself might not solve the riddle. A medium once claimed to have contacted Dickens’s spirit and, upon asking him how he was occupying himself in the spirit world, received the disconcerting reply that he was still trying to solve the mystery of Edwin Drood!

　　21. The story of Edwin Drood was ______.

　　A. written after Dickens’s other novels

　　B. written sometime before 1914

　　C. set near London

　　D. All of the above

　　22. The mystery remains a mystery because ______.

　　A. Cloisterham Cathedral doesn’t exist

　　B. the suspect died before being tried

　　C. the trial was inconclusive

　　D. Dickens never finished the story

　　23. The second paragraph of this article serves to ______.

　　A. raise some unanswered questions about the novel

　　B. introduce some of the novel’s central characters

　　C. suggest some supposed motives for the crime

　　D. Both A and B

　　24. The article implies that we don’t even know for sure that ______ .

　　A. Dickens wrote the novel

　　B. Jasperwas Drood’s uncle

　　C. Drood was murdered

　　D. Chesterton was a writer

　　25. None of the proposed solutions to the mystery is really satisfactory because ______.

　　A. none of them explains Datchery’s identity

　　B. the story is unlike Dickens’s other mysteries

　　C. no one knows what Dickens intended

　　D. Both B and C

　　When Christian Bemard, a South African doctor, performed the first human heart exchange in 1967, the result was a worldwide moral discussion on the rights and wrongs of exchanging parts of the body. Hearts were not the first human parts to be exchanged but, in this case, if someone gave his or her heart, he or she would obviously and necessarily die (or be dead). Kidney exchanges, which were already quite common in 1967, often involved the transfer of a single kidney from a close living relative. The chances of survival of this person were slightly lowered because he or she now had only one kidney and if that kidney became diseased there would not be a healthy kidney in reserve. Nevertheless, he or she would not certainly die.

　　Since that time, surgical techniques and techniques to help prevent the patient’s bodies from rejecting new parts have developed very quickly. Today, not only hearts and kidneys, but also other parts, which are even more delicate, are exchanged. These developments have led to a far higher proportion of successful operations and this, in turn, has led to a greater demand for exchanges.

　　As a result of the heavy demand for new body parts, a new problem has appeared. For example, in the U