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malaria and dengue

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GmatKiss GMAT Titan Default Avatar
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malaria and dengue Post Sun Apr 29, 2012 11:58 am
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  • Lap #[LAPCOUNT] ([LAPTIME])
    Most efforts to combat such mosquito-borne diseases like malaria and dengue have focused either on the vaccination of humans or on exterminating mosquitoes with pesticides.

    A.like malaria and dengue have focused either on the vaccination of humans or on exterminating
    B.like malaria and dengue have focused either on vaccinating of humans or on the extermination of
    C.as malaria and dengue have focused on either vaccinating humans or on exterminating
    D.as malaria and dengue have focused on either vaccinating of humans or on extermination of
    E.as malaria and dengue have focused on either vaccinating humans or exterminating

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    gmatblood GMAT Destroyer!
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    Post Sun Apr 29, 2012 12:25 pm
    GmatKiss wrote:
    Most efforts to combat such mosquito-borne diseases like malaria and dengue have focused either on the vaccination of humans or on exterminating mosquitoes with pesticides.

    A.like malaria and dengue have focused either on the vaccination of humans or on exterminating
    B.like malaria and dengue have focused either on vaccinating of humans or on the extermination of
    C.as malaria and dengue have focused on either vaccinating humans or on exterminating
    D.as malaria and dengue have focused on either vaccinating of humans or on extermination of
    E.as malaria and dengue have focused on either vaccinating humans or exterminating

    LalaB GMAT Destroyer!
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    Post Sun Apr 29, 2012 12:50 pm
    my answer is E

    Most efforts to combat such mosquito-borne diseases as malaria and dengue have focused on either vaccinating humans or exterminating

    "such as" is idiomatic.

    "have focused" is a proper verb of the noun "efforts"

    on either X or Y , not on either X or on Y. see the difference -"either on X, or on Y"

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    dhonu121 GMAT Destroyer! Default Avatar
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    Post Sun Apr 29, 2012 1:56 pm
    E is the right answer.
    Such as should be used instead of like.
    Either X or Y.
    X and Y should be parallel.

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