According to the passage, trees are useful to man mainly in three ways, the most important of which is that they can ______ It’

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问题 According to the passage, trees are useful to man mainly in three ways, the most important of which is that they can ______
It’s very pitiful that ______

选项 A、man has cut down too many trees
B、man is eager to profit from trees
C、man hasn’t realizes the importance of trees to him
D、man hasn’t found cut that he has lost all trees

答案C

解析 本题考查的也是考生对细节的把握,答案对应于文章第二段首句Unfortunately,in many parts of the world,man has not realized that the third“these services is the most important.very pitiful与Unfortunately相对应。
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