Does_____matter if an engineer is a man or a woman?  
      A. that              B.it                     C. this        D. what

【解析】B 考查it 的用法。

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3... What do most Americans do to protect privacy?

    A. They change behaviors that might disclose their identity.

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    C. They rely more and more on electronic equipment.

    D. They use various loyalty cards for business deals.

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