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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

小题1:B
小题2:A
小题3:C
小题4:D
小题5:C
小题6:D
小题7:D
小题8:B
小题9:A
小题10:B

小题1:根据句子的意思,可知答案为B,表示当…时候,故选B
小题2:根据下文的内容,故选A
小题3:tell sb (not)to do sth,根据文章意思,故选C
小题4:根据意思可知,所有的植物能够抓到更多的阳光,故选D
小题5:根据文章的意思可知答案为C,表示为面对的意思
小题6:根据常识可知答案为D
小题7:根据上下文的内容可知答案为D
小题8:根据上下文的需要可知答案为B,表示照顾的意思。
小题9:根据前文的内容可知答案为A
小题10:in many ways表示在某些方面,为固定词组搭配。
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