Unit 7

1. If more people work together, it'll be possible for us to protect our earth and make it a safe and lovely place to live in.

如果更多的人一起努力，我们就可以保护我们的地球，让它成为一个安全又可爱的居所。

2. Experts tie the problem to rapid urban development, and cutting down trees is another reason which is largely due to human activities.

专家们认为这个问题与城市的快速发展有密切的关系。另一个原因是砍伐树木，也是由人类活动造成的。

3. Today we are growing too fast to remember the importance of sustainable development for both nature and our human world.

如今，我们发展得太快，以至于忘记了可持续发展对自然和人类世界的重要性。

4. It is lucky that humans have realized the importance of sustainable development as well as environmental protection, and things are getting better.

幸运的是，人类已经意识到可持续发展和环境保护的重要性，情况也正在好转。

主语从句与表语从句

在复合句中充当主语成分的句子叫作主语从句，充当表语成分的句子叫作表语从句，它们都属于名词性从句。如：

That my flight was delayed by the sandstorm was known to my family.我的航班因沙尘暴而延误，（这件事）我的家人都知道了。（主语从句）

What we can do is to plant more trees in our city.我们能做的就是在城市里种更多的树。（主语从句）

The question is whether the sandstorm will affect our life.问题是沙尘暴是否会影响我们的生活。（表语从句）

The fact is that we are now facing more and more natural disasters.事实是，我们现在正面临越来越多的自然灾害。（表语从句）

一、主语从句用法

1.主语从句的连接词

2.主语从句后置

为了避免句子中主语过长，显得头重脚轻，常用it作为形式主语，把真正的主语放在句子后部。用it作形式主语有以下几类：

二、表语从句的用法

三、读一读、记一记

. That our environment is badly polluted by human activities is known to all.

我们的环境被人类活动严重污染，这是众所周知的。

· That is what we should do to deal with natural disasters.

这就是我们应对自然灾害应该做的事情。

• Why there are more natural disasters is now being discussed heatedly.

为什么有更多的自然灾害正在被热烈地讨论。

· It was a pity that droughts had caused great damage to some areas these years.

很遗憾，这些年来干旱给一些地区造成了很大的破坏。

• It is lucky that people have decided to make a change.

幸运的是，人们已经决定做出改变。

.It will be possible for us to protect our earth and make it a safe place to live in.

我们将有可能保护我们的地球，使它成为一个安全的居所。

typhoon /tar'fu:n/n.台风

drought /draut/ n.干旱

flood /flʌd/n.洪水；水灾

sandstorm /'sandsto:m/ n.沙尘暴

strike /strark/v.侵袭；撞击

frequently /'fri:kwantli/ adv.频繁地

force /fo:s/ n.力量

pollute /po'lu:t/ v.污染

cancel /'kansl/v.取消；撤销

damage /'daemid3/ n.损坏；伤害

protect /pro'tekt/v.保护

prevent /prr'vent/v.防止；阻止

smog /smpg/ n.雾霾

loose /lu:s/ adj.松的；不牢固的

soil /sorl/ n.土地；土壤

promote /pra'maut/v.促进；提升

urban /'3:ban/ adj.城市的

volcano /vol'kemnau/ n.火

discussion /dis'kASn/ n.讨论

blow/blau/ v.（风）吹

tie/tar/ v.将……联结

vehicle/vi:akl/ n.车辆；交通工具

global /'glaubl/ adj.全球的

sustainable /so'stemnobl/ adj.可持续的

realize /rrolaiz/v.认识到

definitely /'definotli/ adv.确定地

heat waves热浪

make a change 作出改变

acid rain 酸雨

electric car 电动汽车