Question

【题目】________ his parents’ advice, he ________ having made such a silly mistake now.

A. He had taken; would not regret

B. Had he taken; would not regret

C. He had taken; would not have regretted

D. Had he had taken; would not have regretted

Answer 1

【答案】B

【解析】考查倒装和虚拟语气。句意：如果他听取父母的建议，他就不会现在犯如此愚蠢的错误。If从句与过去相反用过去完成时，省略if后，提前had。主句有提示词now，表示与现在相反，用would+动词原形。故选B。