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12．If the old man _______ given first aid immediately，he ________ dead now．（　�。�
A．wasn't； would beB．hadn't been； would be
C．hasn't been； would have beenD．weren't； is

分析 如果那個老人沒有得到及時的急救，他現(xiàn)在已經死了．

解答 B 考查虛擬語氣．這是一個混合時態(tài)的虛擬語氣，if條件句是一般過去時用had done，主句是一般現(xiàn)在時用情態(tài)動詞+do，故答案選B．

點評 虛擬語氣是高考經�？疾榈膬热�，也是英語學習中的一個難點．虛擬語氣用于表示說話人的假想、建議或主觀愿望，所表示的假設并不是事實，而是不可能或是不大可能發(fā)生或實現(xiàn)的，除了掌握if條件句引導的虛擬語氣之外，還要掌握一些與虛擬語氣有關的固定句型結構，首先，判斷是否需要使用虛擬．其次，結合虛擬語氣句式，判斷需使用何種時態(tài)及句式是解題的關鍵．

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