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35.Her team failed in the competition.She is trying to get to the ____ of why some members gave up midway.

    A.bottom         B.floor          C.result          D.effect

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34.However, now Barack Obama who used to struggle with his identity doesn’t see it as a problem any more, ______ an advantage for his successful career.

    A.so            B.or            C.but           D.and

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33.Brazilian researchers say that temperatures in the Amazon region will rise ____ two to three degrees by 2050.

    A.by            B.at             C.to            D.from

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32.Friends have trouble remembering _____ that Kevin Durant did for fun, other than basketball.

    A.where it was     B.what it was      C.how it was      D.why it was

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31.Milan says the need for renewable energies in the face of power shortage and global warming ____ urgent and ____ his invention timely

    A.are; make       B.is; makes       C.are; makes      D.is; make

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30.But Health Minister Stephen Robertson, ____ department devised the kit, said youth suicide was a serious issue.

    A.of which       B.whose         C.which         D.his

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29.____ some support the law, others argue that criminal and civil punishments are not necessary to fight animal abuse.

    A.While          B.Until           C.When          D.Before

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28.There is nobody on the bus ____ a dog.

    A.in place of      B.as well as       C.except for      D.besides

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27.He always checked and rechecked his game and saw ___ he could improve.

    A.where         B.when          C.what          D.how

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