He s ____ to his family because he never tells them he’s working late.

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• 1 The competition is open to both professionals and ____.

  A) aliens B) amateurs C) juniors D) editors

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• 2 Industrial managers employ specialists to keep machines working properly and to ____ the supply of

  A) ensure B) promise C) guarantee D) assure

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• 3 It is difficult to understand this kind of ____ calculation.

  A) intricate C) indispensable

  B) varied D) equable

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• 4 With the map of the city to help them, they had no ____ the place.

  A) difficulties in finding C) difficulty to find

  B) difficulty in finding D) trouble to find

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• 5 Science and technology have brought ____ many changes in our lives.

  A) forward C) out

  B) about D) to

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• 6 I don t think it is funny, but my friend ____.

  A) cannot help to laugh C) cannot but laughing

  B) cannot help laugh D) cannot help but laugh

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• 7 He has a large collection of books, ____ are written in English.

  A) many among C) many ones of which

  B) many in which D) many of which

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• 8 A beam of light will not bend round corners unless ____ to do so with the help of a reflecting devi

  A) made C) having made

  B) being made D) to be made

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• 9 Fertilizers are used primarily to enrich the soil and ____ yield.

  A) increasing B) increase C) to increaseD) have increased

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• 10 You remain about the same as when you parted with us ____ you’ve got a little thinner.

  A) except for B) besides C) except that D) because

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