2019届高考英语精编优选练：完形填空提升练(共7份打包)

精编优选练(三十)　完形填空——说明文(限时：35分钟) A (2018·黑龙江哈尔滨六中三模) New genetic analysis has revealed that many Amazon tree species are likely to survive human­made climate warming in the coming century, contrary to previous findings that temperature increases would cause them to die out. A study, __1__ in the latest edition of Ecology and Evolution, reveals the __2__ age of some Amazonian tree species—more than 8 million years—and __3__ shows that they have survived previous periods as warm as many of the global warming imagined periods __4__ for the year 2100. The authors write that, having survived warm periods in the past, the trees will __5__ survive future warming, provided there are no other major environmental changes. __6__ extreme droughts and forest fires will impact Amazonia as temperatures __7__， the trees will stand the direct impact of higher temperatures. The authors __8__ that as well as reducing greenhouse gas emissions to minimize the risk of drought and fire, conservation policy should remain __9__ on preventing deforestation (采伐森林) for agriculture and mining. The study disagrees with other recent researches which predicted tree species' extinctions__10__ relatively small increases in global average air temperatures. Study co­author Dr Simon Lewis (UCL Geography) said the __11__ were good news for Amazon tree species, but warned that drought and over­exploitation of the forest remained major __12__ to the Amazon's future. Dr Lewis said, “The past cannot be compared directly with the future. While tree species seem likely to __13__ higher air temperatures than today, the Amazon forest is being transformed for agriculture and __14__， and what remains is being degraded (使恶化) by logging (伐木), and increasingly split up by fields and roads.” “Species will not move as freely in today's Amazon as they did in previous warm periods, when there was no human __15__. Similarly, today's climate change is extremely fast, making compari