Choose the best answer: 

Statistics_____ a difficult course for people to understand.

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• Choose the best answer: 

  This plane could get over the mountain if it rose to 10,000 feet. This means it______ over the mountains.

• Choose the letter A, B, C or D to complete the sentence: Science is used in all corners of the world for the __________ of human.

• Choose the best answer: 

  The cookies that you sent over were_________ that I ate them all.

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•  __________, computers are almost always correct. 

• Choose the best answer: 

  Last yeas I earned _____my sister, who has a better position.

• 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)_____. 

  (22).......... 

• Choose the best answer: 

  Bill came to work at the University thirty years__________

• They won’t let him _____ the country.

• After a few hours of practice, you can__________ with computers.

• Choose the best answer: 

  Why did they kick the ball so_______?

• Choose the best answer: 

  He had to act immediately; ________ he would have been too late.

• Choose the best answer: 

  Before Jennifer won the lottery, she_____ any kind of contest.

• Choose the best answer: 

  If I had liked that watch, maybe I ______ bought it.

• Choose the best answer: 

  After _____the fight, the police arrested two men and a woman.

• Choose the best answer: 

  When_____ in international trade, letters of credit are convenient.

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

  She seems to have spent all her life studying in _______ establishments.

• Choose the best answer: 

  He was the best in class at Maths and English; _______ he was the best footballer in the school.

• Choose the best answer: 

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

• Choose the best answer: 

  We are now wet. You______ the raincoats with you.

• Choose the best answer: 

  John Kennedy was _________ of the United States.