◎ 题干
Trees are one of the oldest plants on the earth. Just like us, trees change a lot  1 they grow. At one to three years old, young trees learn to   2  themselves. For example, many tree grow thorns (刺)to tell animals  3 near. Most young trees have large and deep green leaves to  4  enough sunlight and turn it into their food and energy. When trees are four years old, they are strong enough to  5 the challenge(挑战)in life. At the age of fifteen, they become young adults and grow more   6 . They will have their own flowers and fruit. After the trees are twenty to twenty-five years old, they are called real adults because they reach their  7 . Adults trees give us oxygen and natural beauty. If we  8 them very well, they will live healthily for many years. As time goes on, trees begin older and older and even  9 . At this time, they still have their important places in nature and uses for people.  10 many ways, the life of trees is like our own life experience.
小题1:
A.beforeB.when C.after D.since
小题2:
A.protectB.provideC.prevent D.pollute
小题3:
A.to goB.to leaveC.not to goD.not to leave
小题4:
A.enjoyB.keepC.stay D.catch
小题5:
A.getB.receiveC.face D.welcome
小题6:
A.fastB.fasterC.slow D.slowly
小题7:
A.weightsB.heightsC.styles D.sizes
小题8:
A.look forB.look after C.look outD.look at
小题9:
A.dieB.hurtC.wasteD.throw
小题10:
A.OnB.InC.ForD.At
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“Trees are one of the oldest plants on the earth. Just like us, trees change a lot 1they grow. At one to three years old, young trees learn to 2themselves. For…”主要考查了你对  【科教类阅读】【健康环保类阅读】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。