节约，我们可以在减少浪费方面起很大作用。

7. 【答案】ourselves

【试题解析】本句中的反身代词ourselves在句中作为remind的宾语，起强调作用。我们一定要提醒我们自己形成浪费的习惯要比戒除这个习惯更容易。

8. 【答案】than

【试题解析】 本句前面有形容词比较级easier，说明应该使用than与之对应。我们一定要提醒我们自己形成浪费的习惯要比戒除这个习惯更容易。

9. 【答案】 done

【试题解析】 固定搭配do damage to...破坏...；本句把名词damage提前，后面的过去分词短语done to our land作为定语修饰名词gamage。

10. 【答案】say

【试题解析】固定搭配say no to...对...说不....；句义：是我们对浪费说不的时候了。

第三节 阅读理解

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 arc 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（神经元）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