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)........ 

Tom has____had lunch, so he isn’t very hungry.

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Does your new secretary _________ shorthand?

Please _____ the TV before you go to bed.

Robots may play an important __________ in human’s life.

Choose correct answer A, B, C or D to complete the sentence. If the sun shines, we ___________ to the beach

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If it___________ so late we could have coffee.

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“Why are you getting new glasses?” “Because it’s difficult_______ the small print in the newspaper”.

Choose correct answer A, B, C or D to complete the sentence. What is a washing machine used _________?

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Where are the children? “I saw_______ in the yeard”.

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_____by the visitor, the clavichord could not be used.

_____ is a machine that prints words from a computer.                                              

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“Did you hear the phone ring last night?”.

          “I didn’t hear anything, I was_____ that I didn’t wake up”.

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Every_____ enjoyed the lesson.

Could robots __________ football with me in the future?

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We avoid _______ our environment.

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I am sure Miss Smith_______ use the new equipment.

Choose correct answer A, B, C or D to complete the sentence. Space travel is one of the marvels wonders of modern _______

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He responded to my question_______

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_____their work, they went home.

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He’s taken his medicine, _______?