如图中共有（　　）个角．

    We all need a healthy environment, but we produce waste every day and it does harm to our environment. ____ we are young, we can still do something to help. In fact, even the simplest everyday activities can make ____ real difference to the environment. Here are some ideas for you to live a green and healthy ____.

    Remember these three words: reduce, reuse and ____.

    Reduce means "use less". If we stop wasting, we can not only ____ money but also reduce pollution and waste. Before we buy something new, think whether it is really necessary or maybe the old one will be just as good! If ____, choose local products and try not to buy too many things from abroad when we do need something.

    Reuse means "use again". Use things for as long as possible. When we buy things, ____ sure that they can last a long time. We should take care of them so that they will last long and we should repair them if we can instead of throwing them away and buying new ones. Don't use a paper cup or a paper bag. It's better to use a china(瓷器) cup and lunch box because you can use them ____.

   Recycle means "change things ____ something else". Although it takes energy to do this, it's better than throwing things away or burning them. We can do this in many ways. For example, we can find out ____ can be recycled in our neighborhood and take part in the recycling programs and we can also buy products made from recycled materials, such as recycled paper to help save trees.

阅读短文，回答问题。

    古希腊的佛里几亚国葛第士以非常巧妙的方法，在战车的轭(è)上打了一串结。他预言：谁能打开这个结，就可以征服亚洲。一直到公元前334年，还没有一个人能够成功的将绳结打开。这时，亚历山大入侵小亚西亚，他来到葛第士绳结之前，便拔剑砍断了绳结。后来，他果然一举占领了比希腊大50倍的波斯帝国。

    一个孩子在大山里割草，被毒蛇咬伤了脚。孩子疼痛难忍，而医院在远处的小镇上。孩子毫不犹豫地用镰刀割断受伤的脚趾，然后，忍着疼痛保住了自己的生命。

    一位朋友到一家餐馆应征做钟点工。老板问：“在人群密集的餐厅里，如果你发现手上的托盘不稳，即将跌落，该怎么办？”许多应聘者都答非所问，朋友答道：“如果四周都是客人，我就要尽力把托盘倒向自己。”最后，朋友成功了。

    亚历山大果断地用剑砍绳结，说明他舍弃了传统的思维方式；小孩果断地舍弃脚趾，以短痛换取了生命；服务员果断地把即将倾倒的托盘投向自己，才保证了顾客的利益。在某个特定的时候，你只有敢于舍弃，才有机会获得更长远的利益。即使遭到难以避免的挫折，你也要选择最佳的失败方式。

    成功往往蕴涵于取舍之间。不少人看似素质很高，但他们往往难以舍弃眼前的蝇头小利，而忽视了更长远的目标。成功者有时仅仅抓住了一两次被别人忽视了的机遇，而机遇的获取，关键在于你是否能在人生道路上进行果断的取舍。