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1. The case of Ashanthi Desilva is mentioned in the text to _______。
[ A ] show the promise of gene-therapy
[ B ] give an example of modem treatment for fatal diseases
[ C ] introduce the achievement of Anderson and his team
[ D ] explain how gene-based treatment works
2. Anderson’s early success has_______。
[ A ] greatly speeded the development of medicine
[ B ] brought no immediate progress in the research of gene-therapy
[ C ] promised a cure to every disease
[ D ] made him a national hero
3. Which of the following is true according to the text?
[ A ] Ashanthi needs to receive gene-therapy treatment constantly.
[ B ] Despite the huge funding, gene researches have shown few promises.
[ C ] Therapeutic genes are carried by harmless viruses.
[ D ] Gene-doping is encouraged by world agencies to help athletes get better scores.
4. The word “tarnish” (line 4, paragraph 4) most probably means _______。
[ A ] affect
[ B ] warn
[ C ] trouble
[ D ] stain
5. From the text we can see that the author seems _______。
[ A ] optimistic
[ B ] pessimistic
[ C ] troubled
[ D ] uncertain
本篇文章是說明文，主要說明基因療法的前景、現狀、遭遇的問題以及人們對待基因療法的態度。文章第一段以上世紀90年代一次成功的基因治療為例說明基因療法的廣闊前景。第二段介紹了基因療法的現狀和治療機制。第三段介紹了目前用基因療法治療多種疾病的研究情況。第四段介紹了基因療法遭遇的問題以及人們對基因療法的態度。
答案及解析
1.A【解析】文章第一句話對用基因療法治療Ashanthi所患罕見疾病的成功給予了很高的評價，並在第一段末指出醫生們對基因療法寄予了極高的期望。因此正確答案為A。
2.B【解析】文章第二段一開頭就說：“It’s not entirely clear why medicine has been SO slow to build on Anderson’s early Success.”從時間上來看，Anderson採用基因療法的`成功嘗試已經是l990年的事情了，兩相對照，可見他的成功沒有讓醫學加速發展。因此正確答案為B。
3.C【解析】文章第二段對於基因治療的方式的解釋是用於治療的基因通過“viruses that don’t cause human disease”進人體內，就好像“特洛伊木馬”一樣，由此可見，這些病毒是無害的。因此正確答案為C。
4.D【解析】第四段提到基因療法遭受的一起挫折—一個病人因接受基因療法而死亡;接著講專家擔心運動員利用基因在比賽中作弊會進一步tarnish這一領域，從上下文邏輯推理，應該是“有損，玷汙”這一類的意思，因此正確答案為D。
5.A【解析】作者的態度從文章第一句話和最後一句話就可以明顯判斷出來。第一句話說基因療法是20世紀的偉大成就之一，最後一句話說“Everybody recognizes that gene therapy is a very good idea，由此可見作者對基因療法持積極樂觀的態度。因此正確答案為A。
