剑桥雅思15Test1Part4听力答案解析 The Eucalyptus Tree in Australia
剑桥雅思15听力第一套题目第四部分由10道提纲型填空题组成。无论是出题方式、论述话题、还是题型都很普通，没有什么太过特殊的地方，希望大家能够保持较高的正确率。下面是具体每道题目的答案解析。
点击查看这篇雅思听力对应的录音原文与其中出现的高频词汇：
剑桥雅思15 Test1 Part4听力答案解析
第31题答案：shelter
对应原文：well the eucalyptus tree is an important tree for lots of reasons. For example, it gives shelter to creatures like birds and bats
答案解析：听到小标题对应的important意识到答案即将到来，空前词provides与gives同义替换，根据修饰关系锁定答案为shelter。
第32题答案：oil
对应原文：It’s useful to us humans too, because we can kill germs with a disinfectant made from oil extracted from eucalyptus leaves.
答案解析：不少同学可能不太认识题干末尾的disinfectant（杀菌剂），因此没有意识到它的提示作用。不过只要我们听到前面的too，就可以知道31题已经结束，录音进入32题。随后再根据词性和重读筛选出oil。
第33题答案：roads
对应原文：the cause of the problem was lime, or calcium hydroxide to give it its proper chemical name, which was being used in the construction of roads
答案解析：这道题的难点主要在于跟32题的答案相隔太远，很容易让人怀疑自己是不是一不小心漏过去了。不过只要足够耐心等到lime，就很容易发现construction和空前词making的同义替换，进而锁定roads。
第34题答案：insects
对应原文：Again it’s the leaves of the trees that are affected What happens is that insects settle on the leaves and eat their way round them
答案解析：同样又是隔了很多句废话才到34题。虽然这道题的提示词不太明显，但题干老烤鸭雅思问的是“什么东西吃这种树的叶子”，很容易猜到答案可能是虫子。听到insects之后确认之前的猜想，直接写答案就好。
第35题答案：grass(es)
对应原文： If there are very frequent bushfires in a region, this encourages grass to grow afterwards
答案解析：听到frequent bushfires意识到答案即将到来，空前词growth与grow词性替换，锁定grass为答案。
第36题答案：water
对应原文：Why do fairly frequent bushfires actually support the growth of eucalyptus? Well, one reason is that the fire stops the growth of other species which would consume water needed by eucalyptus trees
答案解析：听到growth of eucalyptus意识到答案即将到来，这道题的空前修饰词more在原文中并没有很明显的同义替换，我们只能根据词性筛选出water来。
第37题答案：soil
对应原文：And there’s another reason. If these other quick-growing species of bushes and plants are allowed to proliferate, they harm the eucalyptus in another way, by affecting the composition of the soil, and removing nutrients from it.
答案解析：跟上一道题的出题方式比较类似，空前修饰词quality of在原文中同样没有明显的同义替换，只能在锁定句子之后，根据词性进行筛选。
第38题答案：dry
对应原文：Now scientists believe that this reduced frequency of bushfires to low levels has led to what’s known as ‘dry rainforest’
答案解析：在连续两道稍有难度的题目之后，38题就简单许多。直接根据rainforest即可确定dry为正确答案。
第39题答案：simple
对应原文：unlike tropical rainforest which is a rich ecosystem, this type of ecosystem is usually a simple one
答案解析：根据与ecosystem的修饰关系可以锁定rich和simple这两个单词，前者有否定，因此排除，确定simple为答案。
第40题答案：nest(s)
对应原文：he vegetation provides lots of shade, so one species that does find it ideal is the bell-miner bird, which builds its nests in the undergrowth there
答案解析：考察所有格的同义替换，将题干中的of the bell-miner替换为its。因为提示词较为短小，比较考验大家听音辨音的能力。
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