Question

    Forests are the lungs of the earth. Without them, it cannot breathe. It needs its forests to remove carbon dioxide from the air and to make oxygen. In many countries, such as New Zealand, Canada, and Brazil, forests were cut down to1. (提供)wood to build houses. Cutting down trees is h2. to human beings,animals and plants. Many young volunteers around the world are working in their holidays to plant new trees to replace them.

These young men and women f3. many difficulties when they plant new trees. The weather may be very hot and dry or may be very cold and wet. Tree 4.(种植者) are changing the world. They plant different types of trees so that birds and animals can live in the forests. They b5.that in 50 years their little trees will become beautiful forests.

Answer

1.offer

2.harmful

3.face

4.planters

5.believe

【解析】

森林是地球的肺，对人类、动物和植物都是有益的，许多年轻的志愿者在假期种植新树，他们相信他们的小树将来会变成美丽的森林。

1.

句意：在许多国家，例如新西兰，加拿大和巴西，森林被砍伐以提供木材建造房屋。

根据汉语提示以及句中“wood to”可知，此处使用动词offer，offer sth. to do sth.提供某物做某事；forests是主语，were cut down是谓语，此处动词不定式to offer作目的状语。故填offer。

2.

句意：砍伐树木对人类、动物和植物都是有害的。

句中is是be动词，所以此处使用形容词；根据上文中“Forests are the lungs of the earth. Without them, it cannot breathe.”可知，森林是地球的肺，没有它们，地球就不能呼吸，也就是说森林对人类、动物和植物都是有益的，所以砍伐树木对人类、动物和植物都是有害的；harmful是形容词，意为“有害的”。故填harmful。

3.

句意：这些年轻的男女在种植新树时面临许多困难。

根据句中“many difficulties”和下文中“The weather may be very hot and dry or may be very cold and wet.”可知，在他们种植新树的时候，天气可能非常炎热和干燥，也可能非常寒冷和潮湿，这些都是他们需要面对的困难；face是动词，意为“面对，面临”，根据句中plant可知，句中时态为一般现在时，主语是these young men and women，所以此处使用动词原形。故填face。

4.

句意：树木种植者正改变着这个世界。

根据汉语提示可知，此处使用planter；planter是可数名词，根据句中are可知，此处应使用planter的复数形式。故填planters。

5.

句意：他们相信50年后，他们的小树会变成美丽的森林。

根据句中“their little trees will become beautiful forests”并结合首字母可知，此处使用动词believe，意为“相信”，表示“他们相信50年后，他们的小树会变成美丽的森林”；根据上文中plant可知，时态为一般现在时，所以使用动词原形。故填believe。