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)_____. 
(21).........

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She wishes she ______ a fairy now.

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He was a friendly waiter. He spoke to the writer_______

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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 I left my pen in this box, but it isn’t there now. Someone______ it.

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“Who is in class today?”

          “Everyone_____ Sam, who is sick”.

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I did it_____ they asked me to.

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I think they are now accustomed to _______ 12 hours a day.

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”What did you do on Sunday?”

          “It was_____ day that I went to the lake”.

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Daisy is reading her English test because she has a test tomorrow. She_____ be studying.

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 If you had told us earlier_______ he was, we could have introduced him at the meeting.

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The machine created _______that I couldn’t sleep.

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“I hear that Mrs. Saunders has a lot of money”.

          “She’s_____ rich that she takes a helicopter to work”.

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This poor old man wishes he_____

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As an orphan, he _____ earn his living alone.

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Since I left Venezuela six years ago, I_____ to visit friends and family several times.

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By knew that he would be able to reach the South Pole. It would be______.

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My sister has a ________ baby.

 I agreed_____my mother about most things.

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They haven’t decided yet. They are_______ undecided.

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