问题
选择题
_____ his overdrinking, the accident would not have happened.
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答案
B
本题考查虚拟语气。but for表示“要不是”，与动词虚拟语气连用。if it were not for… (=" were" it not for…) if it hadn't been for… (=" had" it not been for…)"要不是因为有……;如果不是……"