6．With the development of modern society，human beings are increasingly invading wild animals'habitat as well as the wild plants'．Nearly a third of the world's cacti （仙人掌） are facing the threat of extinction，according to a shocking global assessment of the effects．
Cacti are an important provider of food and water to desert wildlife ranging from wolves and deer to tortoises，bats and birds，and these fauna spread the plants'seeds in return．
But the International Union for the Conservation of Nature （IUCN）'s first worldwide health check of the plants says that they are coming under huge pressure from human activities such as land use changes，commercial and residential developments and shrimp farming．But the paper said the driver of cacti species extinction was the"uncontrolled collection of live plants and private decorating collections，and annual agriculture．"
The findings were described as"disturbing"by Inger Anderson，the IUCN's director-general．"They confirm that the scale of the illegal wildlife trade，including the trade in plants is much greater than we had previously thought，and that wildlife illegal trade concerns many more species than the elephants which tend to receive global attention．"
Cacti are almost always delicious but unlike most others，they store water in their stems alone，enabling them to survive extreme draughts．The plants can be as small as one centimeter in diameter and grow above 19 meters in height．Well over half of the species are used by humans for display decoration，food or medicine．Almost 1，500 types of cacti were surveyed by the IUCN specialists over a five-year period，mostly in America．
Dealing with the illegal trade is a hard task as they can be hidden in suitcases or even socks．While countries such as Peru have made progress in blocking the illegal trade，the IUCN is calling for more strictly carrying out the Convention on International Trade in Endangered Species （Cites） in the"hotspots''of Uruguay，Brazil and Chile．Mexico has made advances but still has work to do，according to Goettsch．
25．What does the third paragraph mainly tell us？A
A．What causes cacti species extinction
B．What gives people pressure
C．What IUCN has found
D．What farmers have planted
26．In Inger Anderson's opinion，D．
A．the findings of the IUCN are not disturbing
B．the illegal plant trade is less serious than we had thought
C．cacti have received much global attention
D．the illegal plant trade threatens lots of wildlife
27．Why is it hard to fight against cacti trade？B
A．Because cacti can be made into socks．
B．Because cacti are easy to carry secretly．
C．Because many countries carry out Cites strictly．
D．Because some countries made advances to trade cacti．
分析 伴隨著現(xiàn)代社會(huì)的發(fā)展，人類對(duì)野生動(dòng)植物的破壞越來(lái)越嚴(yán)重．
解答 ADB
25． A 段落大意題，分析第三段的內(nèi)容，根據(jù)第三段中的最后一句But the paper said the driver of cacti species extinction was the"uncontrolled collection of live plants and private decorating collections，and annual agriculture．"，可知本段主要講述的是這些仙人掌是如何絕種的．故選A．
26． D 細(xì)節(jié)理解題，根據(jù)第四段中的They confirm that the scale of the illegal wildlife trade，可知是非法的偷運(yùn)嚴(yán)重地威脅了多種野生的生命．故選D．
27． B 細(xì)節(jié)理解題，根據(jù)最后一段的第一句Dealing with the illegal trade is a hard task as they can be hidden in suitcases or even socks，可知仙人掌是很容易秘密地進(jìn)行偷運(yùn)地，故選B．
點(diǎn)評(píng) 考察學(xué)生的細(xì)節(jié)理解和推理判斷能力，做細(xì)節(jié)理解題時(shí)一定要找到文章中的原句，和題干進(jìn)行比較，再做出正確的選擇．在做推理判斷題不要以個(gè)人的主觀想象代替文章的事實(shí)，要根據(jù)文章事實(shí)進(jìn)行合乎邏輯的推理判斷．
