选词填空是英语四级考试全面改革后的新题型，对考生的篇章阅读能力有了更高的要求。为了帮助大家提高选词填空的阅读能力，下面是小编为大家带来，希望对大家的学习有所帮助!
四级英语选词填空模拟练习：
Climate change has claimed its latest victim：Limacina helicina，a planktonic，predatory捕食的sea snail that’s a member of the taxonomic group more36__________ known as sea butterflies.Thename is37__________ from the wing-like lobes叶瓣the tiny creatures use to get around.In a study38__________ published in joumal Proceedings of the Royal Society B，a group of scientistsfrom the National Oceanic and Atmospheric Administration NOAAand Oregon State University have fQund that the Pacific Ocean’s decreasing pH—its acidifying酸化，in other words-is dissolvingL.helicina’s thin shells.
The researchers collected sea butterfly39__________ from 13 sites along the Pacific coastbetween Washington and southern CaliforniA.，going over each with a scanning electronmicroscope.More than half of the shells53%from onshore individuals40__________ signs of“severe dissolution damage，”while 24%of41
__________ individuals suffered dissolution damage.The study’s42__________ investigator,Dr.NinaBednarsek of NOAA，described the affected L.helicina shells as having a texture notunlike“cauliflower”or“sandpaper.”
According to the paper，there was a“strong positive43__________ ”between the proportion of sea butterflies with severe shell dissolution damage and“the percentageofundersaturated未达到饱和的water”near the ocean’s surface.The researchers conclude“shell dissolution owing tohuman.caused ocean44_________has doubled in near shore habitats sincepre.industrial conditions across this region and is on track to triple by 2050，”a truly45__________ prediction.Moreover,the broader implications for ecosystem are unclear,as damaged shellsmake it harder for L.helicina to fight infections，stay buoyant，and protect themselves from predators.
选词填空练习题：
A.showed
B.recently
C.protected
Dmonly
E.derived
F.samples
G.offshore
H.principal
I.noticed
J.correlation
K.encouraging
L.seaward
M.acidification
N.grim
O.pollution
四级英语选词填空模拟练习译文：
气候变化已公布了其最新的受害者：鯱螺学名Limacinahelicina，一种捕食性浮游海螺，被36普遍称为海蝴蝶分类组中的一员“海蝴蝶”之名37来源于微小生物用来游走的翼状叶瓣。在38最近《皇家学会学报B》刊载的一项研究报告中，来自美国国家海洋和大气管理局NOAA及俄勒冈州立大学的科学家们指出：太平洋的PH正在不断下降一换句话说，海水的酸化正在溶解鯱螺的薄壳。
研究人员收集了太平洋沿岸从华盛顿到南加州之间13个地点的海蝴蝶39样本，并用扫描电子显微镜对其一一进行深入检查。来自海岸的个体样本中有一半以上53%的贝壳都40呈现出“严重溶解”的迹象，而在来自41海面上的个体样本中仅有24%的贝壳受到溶解破坏。该研究的42首席研究员，来自NOAA的NinaBednarsek指出那些受到影响的鯱螺的贝壳都拥有“菜花”状或者“砂纸”状的纹理。
据该研究报道，严重损伤的贝壳数量与海洋表面附近“欠饱合海水”百分率之间呈现出“强烈的正43相关”。研究人员推断出，“自该区域工业化时代以前的海洋条件算起，近海栖息地由于人为导致的海洋44酸化引起的贝壳溶解已经翻了一倍，到2050年可能会增至三倍，这真是个45糟糕的预言。此外，这对生态系统的更广泛影响并不明确，因为受伤的外壳会让鯱螺更难以抵御感染、保持浮力及逃脱捕食者的猎杀。
四级英语选词填空模拟练习参考答案：
N E B F A G H J M N
