12．I've always been very ______ about giving my address and QQ number to strangers．（　�。�
A．curiousB．concernedC．cautiousD．confused

分析 在把地址和QQ號碼給陌生人的時候我總是很小心．

解答 答案是C．
本題考查形容詞詞義辨析．curious好奇的；concerned關(guān)心的，擔(dān)心的；cautious小心謹(jǐn)慎的；confused感到困惑的；根據(jù)常識，對陌生人要"謹(jǐn)慎"，所以答案選擇C．

點評 辨析形容詞要在識記常見形容詞及其搭配的基礎(chǔ)上理解語境，根據(jù)具體語境推斷合理的答案．

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