2020版高考英语一轮复习Unit2Cloning高考拆组训练新人教版选修8

Unit 2 Cloning阅读理解组块专练——练速度(限时：30分钟)Ⅰ.阅读理解AAt your next meeting, wait for a pause in conversation and try to measure how long it lasts.Among English speakers, chances are that it will be a second or two at most. But while this pattern may be universal, our awareness of silence differs dramatically across cultures.What one culture considers a confusing or awkward pause may be seen by others as a valuable moment of reflection and a sign of respect for what the last speaker has said. Research in Dutch (荷兰语) and also in English found that when a silence in conversation stretches to four seconds, people start to feel uneasy. In contrast, a separate study of business meetings found that Japanese people are happy with silences of 8.2 seconds — nearly twice as long as in Americans' meetings.In Japan, it is recognised that the best communication is when you don't speak at all. It's already a failure to understand each other by speaking because you're repairing that failure by using words.In the US, it may originate from the history of colonial (殖民地的) America as a crossroads of many different races. When you have a complex of difference, it's hard to establish common understanding unless you talk and there's understandably a kind of anxiety unless people are verbally engaged to establish a common life. This applies also to some extent to London.In contrast, when there's more homogeneity,_perhaps it's easier for some kinds of silence to appear. For example, among your closest friends and family it's easier to sit in silence than with people you're less well acquainted with.A．The Dutch. B．Americans.C．The English. D．The Japanese.解析：选D 细节理解题。

根据第二、三段内容可知，日本人在谈话中沉默时间最长。

故选D。

2．What might the Japanese agree with in conversation?A．Speaking more gives the upper hand.B．Speak out what you have in your mind.C．Great minds think alike without words.D．The shorter talking silence, the better.解析：选C 推理判断题。

根据第四段首句可知，在日本，一般认为最好的交流是一句话不说的时候。

因此推断日本人认为“伟大的心灵，无言而喻”。

故选C。

3．What can we learn from the text?A．A four­second silence in conversation is universal.B．It's hard for Americans to reach a common agreement.C．English speakers are more talkative than Japanese speakers.D．The closer we and our family are, the easier the silence appears.解析：选D 推理判断题。

根据文章最后一句可知，亲密的人之间更容易出现沉默，因此我们和家人越亲密，沉默越容易出现。

故选D。

4．What does the underlined word “homogeneity” in the last paragraph mean?A．Similarity. B．Contradiction.C．Diversity. D．Misunderstanding.解析：选A 词义猜测题。

根据下文的举例可知，越亲密的人，越容易出现沉默，因此推断画线句表示相比而言，当有更多相似时，也许沉默更容易出现。

故画线词意思与similarity意义相近。

故选A。

BPlant cloning has been an agricultural technique used by farmers and gardeners for centuries. Grafting (嫁接) is a common form of plant cloning. Many plants in nature actually clone themselves and reproduce asexually (无性生殖地)．Cloned plants are much more predictable than normal plants, so their yield (产量) is more reliable. Cloned plants also reproduce faster, limiting the amount of time between planting and harvesting. It is also often cheaper to produce seeds through cloning than through traditional methods. Plants can essentially be optimized so that farmers or individual growers always have the best seeds available. With higher yield at a faster rate, farms can produce more food for more people while decreasing overall costs.Cloning can be used to wipe out diseases that previously killed off entire fields of crops. This would make plants immune to the kinds of diseases that farmers andgardeners around the world fear each year. Crop failures due to disease and virus could become a thing of the past. Also, plants that are near extinction can be brought back to life through cloning.Through cloning scientists can develop super fruits and vegetables of superior (更好的) nutritional quality. This could make for a healthier population overall. This has already been done through selective pollination (授粉), and genetic cloning could take it to the next level.By plant cloning we have a population of identical plants and all these plants equally suffer from the same diseases, but in nature the weak would die and the strong would survive. While there are some dangers to consider with plant cloning, there are plenty of benefits that could prove vital to the propagation (繁衍) of the human species.语篇解读：本文是说明文。

文章主要介绍了植物克隆的好处。

5．The unde rlined word “optimized” in Paragraph 2 is closest in meaning to “________”．A．grown B．producedC．perfected D．examined解析：选C 词义猜测题。