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Because they usually receive the same score on standardized examinations, there is often disagreement as to _________ is the better student, Bod or Helen.

Choose the word (a, b, c, or d) that best fits each of the blank spaces. 
Computers are very (21)____, but they also can (22) _____ problems. One kind of problem is with the computer’s memory. It is not perfect, so (23) ____ computers lose (24)______information. Another problem is with the machinery. Computers are machines, and (25)_____can break down. When computers break down, they may erase information, like chalk on a blackboard. Or they may stop doing anything at all. And there is another different kind of problem with computers. Some doctors say they may be bad for your (26)_____. 

(24)........ 

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“What is your opinion of the Smiths?”.

          “They are_____ people”.

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“Don’t take a taxi. We insist_______ in our car.

Now we __________  human to do such work as mining minerals.

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Both viruses and genes_____ made from nucleoproteins.

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Pollution together with water erosion_____ its toll on the building.

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This animal extracts _________ from food to sustain itself.

Robots ___________  an important role in our life.

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Would you please____________ write on the test books?

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“Did you paint our house yourself?” “No, I had some friends_______ me”

Choose the letter A, B, C or D to complete the sentences:

 Space travel is one of the marvels wonders of modern _______.

Recently, it is important__________ about computers. There are a number of things to learn. 

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I borrowed four books on gardening the last time I _____ to the library.

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“The cupboards are really empty”.

          “Yes, all the food_____ eaten”.

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She made a lot of mistakes but I wish she______

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Your mother and I are looking forward_______ you.

Choose correct answer A, B, C or D to complete the sentence. I'd rather work in the field than_____ at home

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Would you mind _________ please?

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I really appreciate____ to help me, but I am sure that I will be able to manage by myself.

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 You _____ throw litter on the streets.