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    57 C) bring about a d rop in the divorce rate。
    58 D) living separately would be too costly。
    59 D) Falling housing prices。
    60 D) It will irreparably damage their relationship。
    61 A) The economic recovery will see a higher divorce rate。
    62 C) It profits by selling its users’ personal data。
    63 B) They don’t know their personal data enriches Facebook。
    64 A) To render better service to its users。
    65 C) Formulating regulations for social-networking sites。
    66 C) He doesn’t want his personal data abused.