Jackfelloffaladderyesterdaybuthe’sallright.He’sluckyhe

問題詳情：

Jack fell off a ladder yesterday but he’s all right. He’s lucky he ______ hurt himself badly.

   A. might       B. would         C. could have       D. should have

【回答】

知識點：虛擬語氣與情態動詞

題型：選擇題