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    【题目】I choose to shop __________ because it saves time and effort.

    A. on the air B. on the Internet

    C. on TV D. in magazines

    【答案】B

    【解析】句意:我选择网上购物，因为可以节省时间和精力。on the air在广播中，直播地；on TV通过电视收看节目；on the Internet在网络上；in magazines在杂志里。依据句意理解，选项B符合题意。

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