Scientists ____ thousands of chemicals before they decided on the right one in the end.

试卷相关题目

• 1China's oil price _____ very sharp increase during the year 2010 and it is continuing to rise further in 2011.

  A.observed

  B.witnessed

  C.proved

  D.supplied

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• 2One island and two lakes _______________ the country.

  A.make up

  B.makes up of

  C.is made up of

  D.consists of

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• 3If better use ______your spare time，you'll make good progress in doing your business.

  A.is spent on

  B.is made of

  C.is used for

  D.is taken up

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• 4It ________ me that he always finishes his work in a short time. He is well-known for his working at an ________ speed.

  A.amazes; amazing

  B.amazed; amazed

  C.amaze; amazed

  D.amaze; amazing

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• 5---How about your trip to Italy? ---Oh, ________ the fine weather, we enjoyed ourselves indeed.

  A.in regard to

  B.thanks to

  C.in spite of

  D.regardless of

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• 6--- I was wondering if we could go skiing on the weekend. --- ______ good.

  A.Sound

  B.Sounded

  C.Sounding

  D.Sounds

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• 7We all sang high praise for the important part he ___________ in this match.

  A.played

  B.did

  C.had

  D.took

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• 8This medicine will ____________ him of his bad cold.

  A.recover

  B.cure

  C.treat

  D.heal

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• 9Several years after they got married he ____ chatting on the Internet until very late, which eventually resulted in their divorce.

  A.took on

  B.came to

  C.took to

  D.came about

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• 10It is known to us that lions and tigers ________ the cat family.

  A.are belonging to

  B.belonged to

  C.belong to

  D.are belonged to

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