Unfortunately, the research was limited __________ increasing economic profits, _________ protecting the environment.

试卷相关题目

• 1I'm not sure whether he has the key that ______ the door of the classroom.

  A.had belonged to

  B.belonging to

  C.belongs to

  D.is belonged to

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• 2The great achievements in recent 30 years have proved that the reform and open policy is a vital measure that ________ the national conditions of Chin

  A.A.fits into

  B.turn into

  C.break into

  D.look into

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• 3The number of  the students in our school ________ about 3000 and ______ them study hard.

  A.is, a large amount of

  B.are, a number of

  C.are, large amount of

  D.is, a large number of

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• 4It is not easy to learn English well but if you ______, you will succeed in the end.

  A.hang up

  B.hang about

  C.hang on

  D.hang around

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• 5The book, which sells well, is _______ on a true story.

  A.based

  B.focused

  C.decided

  D.located

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• 6— Hi, what's the rush? — I am off to the library right now to _______  a seat for my roommate!

  A.preserve

  B.order

  C.reserve

  D.provide

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