①_____________

　　THE Earth is about 4,600 million years old．Many of the things that we have done are good，but many more are not good for the Earth．

　　Pollution is②（地球上的一种严重问题）．In big cities Car and buses have polluted the air．Many people in cities now have very bad health problems．

　　③（工厂也对土地和水造成了污染）．As a result, many rivers and lakes are now polluted．All over the world，people have cut down millions and millions of trees．Did you know many kinds of animals and plants are now disappearing（消失）?In particular, flees are very important ④because they produce oxygen （氧气）and control the climate．

　　Now, many people are beginning to take these problems seriously．They are making wind generators（发动机）and planting new flees．There is a group in our class that picks up the garbage at school．Whether the weather is hot or cold we always do it．⑤I think we are setting a good example to everyone else．

　　I hope，in the future，the sky can be clearer, the water cleaner, and the land greener．Then both people and animals can have a greener Earth．

1．请在①出给出文章的题目。

2．请把②的汉语翻译成英语。

3．请把③的英语翻译成汉语。

4．请把④的画线部分翻译成汉语。

5．请把⑤的画线句子翻译成汉语。

小红在骑自行车上学的路上，看见红灯亮起时，就远远的停止蹬踏，让车自由滑行，车恰好停在斑马线前.小红想：车滑行的距离可能与哪些因素有关呢?她猜想：①车滑行距离与车速有关；②车滑行距离与车的质量有关；③……

表二
速度	质量	滑行距离
相同	大	相同
	较大
	小

（1）请你也提出一种合理的猜想：  ▲  ，你的猜想是依据生活中你观察到的什么现象？  ▲ 
（2）小红取来空的圆柱型的玻璃瓶模拟车轮滚动，探究玻璃瓶在水平桌面上滑行距离与质量是否有关．为此，应控制玻璃瓶开始滚动时的  ▲  相同，控制的方法是：    ▲        .

表一
速度	质量	滑行距离
快	相同	远
较快		较远
较慢		近

（3）表一和表二是小红探究的实验记录，根据实验的记录可得到结论：     ▲      .
（4）根据小红探究的结果和自己的生活经验，请给广大司机提出一条合理化的建议： ▲