Question

Rebecca wants to know more about trees and how they help us. Dr. Jones is telling her something 1.trees.

Trees help in many ways. They keep the air cool and clean. They take in  2. (harm) gases from the air and produce oxygen for us 3.(breath). They are major 4.(fight) against air 5. (pollute). Besides, trees can also make our lives even 6. (convenient). Many of the things in our daily lives come from trees. For example, paper and pencils. 7. (actual), we get a lot more from trees. We get fruit and oil from them. Tea also comes from the leaves of trees. Look around this room. Most of 8.furniture is made of wood. Trees are really important in our daily lives. So we can’t imagine what the world would be like 9. there were no trees.

However, we cut down millions of trees every year. We must stop 10. (protect) them if we don’t want a world without trees.

Answer

1. about

2. harmful

3. to breathe

4. fighters

5. pollution

6. more convenient

7. Actually

8. the

9. if

10. to protect

【解析】

本文介绍了有关树木的知识，以及它们是如何帮助我们的。文中介绍了树木的作用。在最后呼吁我们要停止砍伐树木，保护它们。

1.句意：琼斯医生正在给她讲一些关于树的事。tell sb. about sth. 告诉某人有关……的事；用介词about。故填：about。

2.句意：它们吸收空气中的有害气体，产生氧气供我们呼吸。gases是名词，因此前面用形容词来修饰。故答案为：harmful。

3.句意：它们吸收空气中的有害气体，产生氧气供我们呼吸。语境是：产生氧气供我们呼吸。本题是用动词不定式做目的，故填：to breathe。

4.句意：他们是防治空气污染的主要战士。根据are可知此处是名词复数。fight是动词，它的名词为fighter。故答案为：fighters。

5.句意：他们是防治空气污染的主要战士。此处用名词污染。pollute的名词为：pollution。

6.句意：此外，树木还可以使我们的生活更加方便。even修饰比较级，convenient的比较级用more。故答案为：more convenient。

7.句意：事实上，我们从树上得到更多的东西。此处是副词作状语。句子开头大写。故填：Actually。

8.句意：大多数家具都是木制的。由句子Look around this room. Most of ____8____furniture is made of wood.可知，本题的家具是指房子内的家具，表示特指。故填：the。

9.句意：所以我们无法想象如果没有树木世界会是什么样子。本题用if引导条件句，表示假设。

10.句意：如果我们不想要一个没有树木的世界，我们必须停下来保护它们。stop to do sth. 停下来去做某事，这里指停止砍伐去保护它们。因此用动词不定式。故填：to protect。