13．Wearing shoes _______ for the activity you are doing can help avoid some foot injuries to a large extent．（　　）
A．designB．designingC．designedD．to design

分析 穿專門為你所從事的活動(dòng)而設(shè)計(jì)的鞋可以最大限度地避免一些腳的傷害．

解答 答案：C
句中design是作shoes的后置定語，要用非謂語動(dòng)詞；design和shoes構(gòu)成動(dòng)賓關(guān)系，要用表示被動(dòng)的過去分詞．故選C．

點(diǎn)評 過去分詞是非謂語動(dòng)詞的一種，表示被動(dòng)或完成；done過去分詞的簡單式，表示與謂語同時(shí)或幾乎同時(shí)發(fā)生的動(dòng)作；having been done過去分詞的完成式，表示先與謂語的動(dòng)作．學(xué)習(xí)時(shí)，要注意區(qū)分和掌握．

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