However，at times this balance in nature is _______ resulting in a number of possibly unforeseen effects.

试卷相关题目

• 1—Shall we go to the restaurant opposite the supermarket for dinner? —No, it's the _____ place I'd like to go to．

  A.worst

  B.best

  C.last

  D.first

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• 2For our middle school students, some courses are compulsory, while others are ________.

  A.flexible

  B.optional

  C.impressive

  D.significant

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• 3Of the two, I would prefer ________ camera, which is very easy for me to carry.   

  A.a small

  B.a smaller

  C.the small

  D.the smaller

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• 4--- I was walking along the street and all of a sudden, a car cut in and knocked me down． --- You can never be ______ in the street．

  A.careful enough

  B.much careful

  C.very carefully

  D.too carefully

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• 5To their great _____, Tom's problem proved not to be as serious as they had feared.

  A.happy

  B.worry

  C.anxiety

  D.relief

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• 6The only drawback of the voyage was the ______ sea, which made me very seasick.

  A.calm

  B.rough

  C.patient

  D.tough

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• 7After great efforts, he finally achieved his goal, _________.

  A.being pleased but excited

  B.pleasant and excited

  C.pleasantly but excitedly

  D.pleased and excited

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• 8Mary is always ready to do some ______ work at the local geracomium（敬老院）in her spare time.

  A.responsible

  B.exhausting

  C.voluntary

  D.professional

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• 9Your job here is only _____, for you will be removed from it when we have a proper post for you．

  A.permanent

  B.contemporary

  C.temporary

  D.fundamental

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• 10Just like fingerprints, each person's DNA is ________unless he has a twin．

  A.unusual

  B.normal

  C.various

  D.unique

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