If only the patient______a different treatment instead of using the antibiotics, he might still be alive now.
【正确答案】 A
【答案解析】解析:本题考查would rather的用法,would rather表示“宁愿,宁可”,在would rather后面所跟的从句中用虚拟语气,对现在的虚拟谓语动词要用过去式,因此A为答案。