35.---Sir, please keep in mind that this kind of computer, if______ properly, will work for at least ten years. 

---Thank you! I will.

A use          B using         C used        D being used

Section B (18 marks)

Directions: For each blank in the following passage there are 4 words or phrases marked A, B, C and D. Fill in each blank with a word or phrase that best fits the context.

In the past, man didn’t have to think about the protection of his environment. There were few people on the earth, and natural resources seemed to be   36.

Today things are   37  , and the world has become too  38 . We’re using up our natural resources too quickly, and at the same time we are   39 our environment with dangerous chemicals. If we continue to do this, human life on the earth  will not  survive.

Everyone  40 today that if too many fish are taken from the sea, there will soon be none left. Yet, with modern fishing  41 , more and more fish are caught. We know that if too many trees are cut down, forests will disappear and nothing will grow on the land. Yet, we  42 to use bigger and more powerful machines to  cut down more and more trees.

We know that if rivers are polluted with waste products from factories, we’ll die.  43 , in most countries wastes are  still put into rivers or into the sea, and there are  44  laws to stop this.

We know, too, that if the   45  of the world continues to rise at the present rate, in a few years there will not be enough  food . What can we do to solve these problems? 

If we eat more vegetables and less  meat  there will be more food available for every one. Land that is used to grow crops  46 five times more people than land where animals are kept. Our natural resources will  last longer if we learn to recycle them.

The world population will not rise so quickly if people use modern methods of birth control  .

Finally, if we educate people to think about the problems, we shall have a better and cleaner  47 in the future.

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