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.

1.What would be the best title for the passage?

A. Old Trees Communicate Like Humans

B. Young Trees Are In Need Of Protection

C. Trees Contribute To Our Society

D. Trees Are More Complex Than You Think

2. In Simard's opinion, trees _______

A. compete for survival

B. protect their own wealth

C. depend on each other

D. provide support for dying trees

3.We can learn from the passage that .

A. “mother trees” are usually of no use to other trees.

B. Charles Darwin had the same thought as Simard.

C. if “mother trees” are cut down, the survival for the entire forest will be affected.

D. people know much about the complex “tree societies”.

4.The underlined word “it” in the last paragraph refers to .

A. how “tree societies” work

B. how trees grow old

C. how forestry industry develops

D. how young trees survive

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完形填空

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What is the secret of writing a good letter? Here are two main ones. Don’t try to be fancy. Don’t try to impress your reader.You will be successfully if you follow these six Cs.

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When I paid for the bicycle repair, the repairman told me, “ No change, Professor Pan. We’re friends.”

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1.Why did the author insist on paying the repairman while he was offered free repairs?

A. Because he was an upright man.

B. Because he didn’t know the repairman.

C. Because he thought it natural to pay for other’s service.

D. Because he didn’t want to help others in return.

2.Generally, the author thinks that ___________ .

A. Chinese are generous and always ready to help their friends

B. Chinese are good at exchange of equal values

C. Chinese are free enough to drink and chat with their friends

D. Chinese are helpful but don’t treasure time

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A. Still No Free Lunch B. A Good Lesson from Chinese

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A. All the Chinese help foreigners on purpose.

B. Chinese like to ask for help.

C. The author thinks little of the Chinese way of life.

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