题目内容
20．Air isheavier（heavy）than we think．分析 --空气比我们想像中的更重．
解答 答案：heavier 考查单词填空．根据题干：Air is （heavy）than we think．--空气比我们想像中的更重．要用heavy的比较级，变y为i加er，故答案是heavier．
点评 考查单词填空．准确的翻译句意及分析句子结构、时态、固定搭配等是关键，然后再用合适的形式完成句子．
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14．Happiness is important for everyone．Most people want to be happy，but few know how to find happiness．Money and success alone do not bring lasting happiness．Happiness depends on ourselves．In other words，we make our own happiness．Here are a few ways to help you be happier．
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Title；（66）How to get happiness
The first secret of happiness is to enjoy the simple things in life．Too often，we spend so much time thinking about the future-for example，getting into college or getting a good job-that we fail to enjoy the present．You should enjoy life's simple pleasures，such as reading a good book，listening to your favorite music，or spending time with close friends．People who have several close friends tend（有…打算） to live happier and healthier lives．
The second secret to leading a happy life is to be active．Many people experience this，dancing or playing a sport．You can forget about your problems，and only think about the activity．
Finally，many people find happiness in helping others．According to studies，people feel good when they volunteer their time to do many meaningful things for other people．If you want to feel happier，do something nice for someone．
Title；（66）How to get happiness
| What happiness depends on？ | Happiness depends on （67）ourselves |
| （68）How to be happy | To enjoy （69）the simple thingsin life． |
| To be active． | |
| （70）To help others． | |
| Conclusion | Happiness is important for everyone and we make happiness by ourselves． |