【正确答案】 A

【答案解析】[解析] 考点：虚拟语气的倒装形式。通过主句的谓语结构可知，本题属于与过去事实相反的虚拟语气的倒装形式，所以，虚拟条件句的谓语动同应用过去完成时，将助动词had置于主语前构成倒装。 [例句] Had he worked harder，he would have got through the exams． 要是他再努力点，就能通过考试了。