Question

The natural world teaches us a great deal about recycling (循环再利用). In nature, recycling happens every day. For example, when leaves fall to the ground, they will turn into compost (肥料), helping ____ grow healthily and strong. When an animal dies, it becomes food for ____ animals. Nothing is wasted. But humans have created things like plastic bags ____ can’t be broken down by nature. Our rubbish kills animals and ____ water and soil. ____ we continue making too much rubbish, the problem will only get ____ . If nature can’t reuse the rubbish, we ____ recycle it. We should clean up the rubbish we’ve made because nature can’t.

    Recycling is important. In reusing material instead of throwing it away, we can also benefit from it. ____ the Earth is rich in natural materials like water and trees, these materials are not endless. We use up our natural materials much faster than the Earth is able to reproduce them. For example, each year we ____ more than 6,000 square miles of forest. But it ____ an average of 25 years for a new tree to grow.

   Recycling can help us save the Earth, so let’s take action right now.

1.A. animals   B. plants   C. humans    D. river

2.A. another   B. other    C. others     D. the other

3.A. who     B. which    C. what      D. where

4.A. pollutes  B. produces  C. recycles   D. cleans

5.A. When    B. Whether  C. Why      D. If

6.A. best      B. better    C. worse      D. worst

7.A. may      B. can      C. must      D. need

8.A. Because   B. If       C. Although   D. As

9.A. break down B. grow up  C. cut down   D. fix up

10.A. spends     B. costs     C. pays      D. takes

Answer

1.B

2.B

3.B

4.A

5.D

6.C

7.C

8.C

9.C

10.D

【解析】

试题分析：这篇完形填空主要介绍了循环再利用的重要性。大自然中有些东西可以自然地被循环利用，而有些东西是需要人工的回收再利用。这样既保护了环境又节约了资源。实际上我们使用我们的自然材料，远超过地球能够生产的。

1.

2.。

3.

4.

5.……的时候； B. Whether是否；C. Why为什么；D. If如果，假如，根据句意及选项意思，故选D。

6.

7.考查情态动词和语境理解。句意：如果自然不能重新使用这些垃圾，我们就必须回收它。根据句子所表达的语气，此处时必须的意思，故选C。

8.

9.

10.；B. costs 物作主语；C. pays 人作主语；D. takes采用形式主语，根据句意及选项分析，故选D。

考点：科普环保类。