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Traces of cultivated emmer wheat have been found amongthe earliest agricultural remains of many archaeological sites in Europe andAsia. The only place where the wild formof emmer wheat has been found growing is a relatively narrow strip of southwestAsia. Since the oldest remains ofcultivated emmer wheat yet found are from village sites in the same narrowstrip, it is clear that emmer wheat was first domesticated somewhere in thatstrip.
Which of the following, if true, most strengthens theargument?
(A) The present-day distribution of another wild wheat,einkorn, which was also domesticated early in the development of agriculture,covers a much larger area of southwest Asia.
(B) Modern experiments show that wild emmer wheat caneasily be domesticated so as to yield nearly as well as traditionally cstrains.
(C) At the time when emmer wheat was first cultivated, itwas the most nutritious of all the varieties of grain that were thencultivated.
(D) In the regioncontaining the strip where wild emmer wheat has been found, climatic conditionshave changed very little since before the development of agriculture.
(E) It is very difficult, without genetic testing, todifferentiate the wild form of emmer wheat from a closely related wild wheatthat also grows in southwest Asia.
答案见下一页：
参考答案: D
思路：结论：it is clear that emmerwheat was first domesticated somewhere in that strip.
原因：the oldest remainsof cultivated emmer wheat yet found are from village sites in the same narrowstrip.
正确答案作用：1. 正确答案一定要提高结论成立的可能性;2. 正确答案一定要能与原因结合，也就是说要么与原因互补，要么与原因有公共的元素。
思考：需要加强emmer wheat在这个strip被培育出来。原因是在这个narrow strip里有emmer wheat的残留物被发现了。答案应该是能与narrow trip能够结合起来。
选项分析：A：无关比较，把einkon拿来比是没有意义的。与结论无关，也与原因无法结合;
B：把emmer wheat的产量与traditionally domesticstrains的产量比较是无关比较。而且跟emmerwheat是否是在strip被培育出来(结论)没有关系，也与原因无法结合。
C：说emmerwheat是最有营养的，既不能与原因相结合，也与emmerwheat在哪培育出来(结论)没有关系。也属于无关比较;
E：分清楚这种emmer wheat和另外一种wild emmer wheat较困难。这个和narrow strip培育出emmer wheat没有关系，也与原因无法结合
D：提到了说到了the narrow strip(In the region containing the strip where wild emmer wheathas been found)，这是个与原因的结合点。这个strip的气候条件一直没有发生改变，那说明，emmer wheat确实很容易在这个narrow strip培育出来。加强了结论。正确答案。
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