Question

It _____ a lot since I left the city. A. is changing B. changes C. changed D. has changed 并解释

Answer 1

选择D，意为:自从我离开这个城市，这个城市改变了不少。
因为出现since，表明用现在完成时，类似的有already（肯定）, yet（否定，疑问）, just, before, recently,still, lately,never,ever, never, twice, on several occasion,in the past few days/weeks/months/years,(up to)these few days/weeks/months/years, this morning/week/month/year, just, up to present, so far,up to now,till now,since+时间
望采纳，谢谢！

Answer 2

D，句意：这个城市改变了很多从我离开以后。表示从过去某个点开始到现在，since一般就是用在完成时态里的，所以用has changed

Answer 3

选D，自我离开这个城市，它已经改变了很多。