(   ) 10. Technology is now more a part of us than ever before―almost an       of the human body at this point.

A. expense    B. exchange    C. exception    D. extension 

10. D考查名詞的用法。expense成本，費用；exchange 交換,交易；exception例外extension延伸。句意：技術(shù)如今比以往更多地成為我們的一部分，在這一點上，幾乎可以說是人體的一種延伸。

題目來源：高考丟分題英語 > Unit 3 Inventors and inventions

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