完形填空Weknowthattreesareusefulinourev

完形填空 We know that trees are useful in our everyday life. They give us1things, such as wood, oxygen, rubber(橡胶), medicines2many other things. They can also tell us a lot about our climate. The following are the reasons. If you cut3a tree, you can see that it has many rings. Most trees grow one new ring4year. Because of this, we know how old a tree is. A tree over a hundred5means that it has more than a hundred6. When the climate is dry or very cold, the trees do not grow very much and their rings7usually thin. When it is wet and warm, the rings 8thicker. If the rings are suddenly very thin or suddenly very thick, it means that the 9changed suddenly. If we look at the rings on the tree, we can learn about the climate in the past years. We can see 10changing today.1.A.muchB.lotC.many2.A.soB.andC.while3.A.downB.crossC.into4.A.everyB.manyC.some5.A.year oldB.oldC.years old6.A.plantsB.ringsC.leaves7.A.isB.areC.were8.A.are muchB.are moreC.is much9.A.dayB.yearC.climate10.A.how our climate isB.how is our climateC.how to our climate

CBAAC BBACA解析1.根据后文things，只有many 修饰，而much+不可数名词，lot不可修饰名词，故选C2. 根据前后句的关系为并列关系，故选B3.cut···down 是将····砍倒的意思，故选A。4.根据上文的内容和生活常识内容，树一年才长一个年轮，故选A5..根据上文内容，hundred后接名词可数名词复数形式，表示岁数为years old。故选C6..根据上文的内容，可知树超过一百多年，故有一百多个年轮，故选B7..当主语为复数形式时，be动词选择are，即选

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