10．Many of us remember cloned dinosaurs running wild in the film Jurassic Park．And the idea of using technology to revive extinct species has long fascinated writers，directors，and scientists．
According to The Telegraph，woolly mammoths（長(zhǎng)毛猛瑪象） may walk the earth once more，now that scientists have taken another step toward realizing a long-held dream-recreating their DNA．Mammoths became extinct around 10，000years ago．However，since the discovery of near perfect preserved remains in Arctic permafrost（北極凍土帶） in May 2013，a variety of research studies have been carried out since．
Geneticists analyzed DNA from the remains，looking for genes which separated mammoths from elephants，such as hairiness and ear size．They then used the results to reproduce exact copies of 14mammoth genes．"It is the first time that mammoth genes have been alive-although so far it has only been done in the lab，"Gorge Church，lead researcher of the project，told the Saturday Times．Church then used a new technique which allows scientists to edit DNA carefully，replacing sections of elephant DNA with the mammoth genes．So"we now have functioning elephant cells with mammoth DNA in them"，he said．
However，Church ruled out the possibility of bringing the mammoths back to life via cloning from frozen remains．He said he"preferred to focus on rebuilding the full mammoth genome by analyzing DNA from preserved remains and putting it into the cells of its closest living relative-the Asian elephant"，reported The Telegraph．Church argued that the return of the woolly mammoths-or rather，the return of something very similar-could help bring back fragile（脆弱的） ecosystems．However，some scientists believe that bringing back the mammoth would be unethical．
"What's the mess？We can be as irresponsible with the environment as we want，then we'll just clone things back？"Alex Greenwood，an expert on ancient DNA，told the Sunday Times，"Money would be better spent focusing on conserving what we do have than spending it on an animal that has been extinct for thousands of years．"
32．What can we infer from the passage？C
A．Scientific studies on reviving extinct species didn't begin until May 2013．
B．The technology to revive extinct species is already mature．
C．Church and his colleagues tried to reproduce mammoth DNA．
D．Church managed to list all the genes separating mammoths from elephants．
33．According to the text，ChurchC．
A．had serious doubts about discovering the full mammoth genome．
B．a(chǎn)imed to clone the extinct mammoth from frozen remains on his own．
C．could help save fragile ecosystem if bringing back something similar to the mammoth．
D．believe their successful experiment could change the Asian elephant into mammoths．
34．Alex Greenwood believes thatD．
A．it is unnecessary to worry about the extinction of Asian elephants at present．
B．it's necessary to bring back species beneficial to humans from extinction．
C．the return of the woolly mammoth would help to balance ecosystems．
D．it's more important to protect present species than to bring back extinct ones．
35．What's the best title of the passage？A
A．Mammoths could return？
B．Mammoths'return helps ecosystems．
C．Mammoths have been extinct for ages．
D．Mammoths'clone from frozen remains．
分析 本文是一篇科教類(lèi)閱讀，主要講了有人試圖復(fù)原長(zhǎng)毛猛犸象這一做法以及這一做法所引來(lái)的評(píng)論．
解答 32：C 考查細(xì)節(jié)推理，根據(jù)文章第三、四及第五段可以推出本題答案為C選項(xiàng)"Church和他的同事試圖復(fù)原長(zhǎng)毛猛犸象的DNA"．
33．C 考查細(xì)節(jié)推理，根據(jù)文章內(nèi)容"the return of something very similar-could help bring back fragile（脆弱的） ecosystems．"可知，如果帶回類(lèi)似于猛犸的東西，就有助于拯救脆弱的生態(tài)系統(tǒng)．故選C．
34：D 考查細(xì)節(jié)推理，根據(jù)文章最后一段"Money would be better spent focusing on conserving （保護(hù)） what we do have than spending it on an animal that has been extinct for thousands of years"（錢(qián)要更好地花在保護(hù)我們已有的而不是花在一種已經(jīng)滅絕了幾千年的物種上）可知本題答案為D選項(xiàng)．
35．A 考查標(biāo)題概括題．文章主要講述了有人試圖復(fù)原長(zhǎng)毛猛犸象這一做法以及這一做法所引來(lái)的評(píng)論，結(jié)合選項(xiàng)文章的標(biāo)題為Mammoths could return．故選A
點(diǎn)評(píng) 本文是一個(gè)科教類(lèi)閱讀理解，題目涉及多道細(xì)節(jié)理解題，做題時(shí)結(jié)合原文和題目有針對(duì)性的找出相關(guān)語(yǔ)句進(jìn)行仔細(xì)分析，結(jié)合選項(xiàng)選出正確答案．推理判斷題也是要在抓住關(guān)鍵句子的基礎(chǔ)上合理的分析才能得出正確答案，切忌胡亂猜測(cè)，一定要做到有理有據(jù)．
