4．Would it surprise you to learn that，like animals，trees communicate with each other and pass on their wealth to the next generation？
UBC Professor Simard explains how trees are much more complex than most of us
ever imagined．Although Charles Darwin thought that trees are competing for survival of the fittest，Simard shows just how wrong he was．In fact，the opposite is true：trees survive through their co-operation and support，passing around necessary nutrition"depending on who needs it"．
Nitrogen （氮） and carbon are shared through miles of underground fungi （真菌）
networks，making sure that all trees in the forest ecological system give and receive just the right amount to keep them all healthy．This hidden system works in a very similar way to the networks of neurons （神經(jīng)元） in our brains，and when one tree is destroyed，it affects all．
Simard talks about"mother trees"，usually the largest and oldest plants on which all other trees depend．She explains how dying trees pass on the wealth to the next generation，transporting important minerals to young trees so they may continue to grow．When humans cut down"mother trees"with no awareness of these highly complex"tree societies"or the networks on which they feed，we are reducing the chances of survival for the entire forest．
"We didn't take any notice of it"Simard says sadly．"Dying trees move nutrition into the young trees before dying，but we never give them chance．"If we could put across the message to the forestry industry，we could make a huge difference towards our environmental protection efforts for the future．
29．The underlined sentence"the opposite is true"in Paragraph 2probably means that treesC．
A．compete for survival
B．protect their own wealth
C．depend on each other
D．provide support for dying trees
30．"Mother trees"are extremely important because theyB．
A．look the largest in size in the forest
B．pass on nutrition to young trees
C．seem more likely to be cut down by humans
D．know more about the complex"tree societies"
31．The underlined word"it"in the last paragraph refers toA．
A．how"tree societies"work
B．how trees grow old
C．how forestry industry develops
D．how young trees survive
32．What would be the best title for the passage？C
A．Old Trees Communicate Like Humans
B．Young Trees Are In Need Of Protection
C．Trees Are More Awesome Than You Think
D．Trees Contribute To Our Society．
分析 本文屬于記敘文閱讀，文章介紹樹和樹之間不是你死我活的競爭關(guān)系，它們之間是相互依賴的，快要死的樹會將自己的營養(yǎng)傳給小樹讓它們更好的成長，人們?nèi)绻肋@些現(xiàn)象，就可以更好的保護這些樹．
解答 29．C 細節(jié)理解題，根據(jù)文章第二段的句子：trees survive through their co-operation and support，passing around necessary nutrition"depending on who needs it"．可知上文提到達爾文的適者生存的理論，而與之相反的是樹是彼此依賴生存的，故選C．
30．B 細節(jié)理解題，根據(jù)文章第四段的句子：She explains how dying trees pass on the wealth to the next generation，transporting important minerals to young trees so they may continue to grow．可知"Mother trees"之所以重要是因為它們會在死前將自己的營養(yǎng)傳給小樹，故選B．
31．A 詞義猜測題，it出現(xiàn)在文章最后一段，而實際上it指代的是第四段提到的內(nèi)容，人們砍倒快死的mother trees是因為他們當時不知道樹的社會之間的依存關(guān)系，可知it指的是"樹的社會"是怎么運作的，故選A．
32．C 主旨大意題，根據(jù)全文內(nèi)容，可知文章介紹樹和樹之間不是競爭關(guān)系，它們之間是相互依賴的，快要死的樹會將自己的營養(yǎng)傳給小樹讓它們更好的成長，從第一段的句子：Would it surprise you to learn that，like animals，trees communicate with each other and pass on their wealth to the next generation？可知作者在本文中想要表達的是樹要比我們想象的要更加令人驚嘆，故選C．
點評 做閱讀理解時要快速的瀏覽全文，把握文章主旨大意，帶著問題回到原文，尋找細節(jié)或概括相應的答案，最后要理清作者寫作思路．
