12．She ______ called to say sorry to me，but my mobile phone was power-off all day long．（　�。�
A．needn't haveB．should haveC．could haveD．mustn't have

分析 她可能打電話想向我道歉，可我的手機(jī)一整天都關(guān)機(jī)了．

解答 答案：C 句意表達(dá)的是對過去的推測；對過去的推測要用情態(tài)動(dòng)詞加完成時(shí)態(tài)；needn't have done本不需要做某事，should have done本應(yīng)該做某事，D項(xiàng)是錯(cuò)誤搭配．故選C．

點(diǎn)評 情態(tài)動(dòng)詞的用法是英語中�？嫉恼Z言點(diǎn)．通�？疾榈姆绞接刑摂M和推測，本題考查的是情態(tài)動(dòng)詞的推測用法．學(xué)習(xí)時(shí)要注意積累．

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