Question

【题目】My grandpa has been enjoying good health ever since he _______ smoking.

A. stops B. stopped

C. has stopped D. had stopped

Answer 1

【答案】B

【解析】分析句子，可知这是一个由since引导的时间状语从句，主句用完成时，从句用一般过去时。根据句意，可知选B。句意：我的爷爷自从戒烟以后身体一直都很好。