If I were you,I______worry so much.A couldn't B mustn't C needn't_英语解答

If I were you,I______worry so much.A couldn't B mustn't C needn't D wouldn't
请问这道英语单选选哪个呢?
请告知为什么选那项,别的为什么不选?最后还请翻译一下这句话..

人气：321 ℃　时间：2020-03-28 22:16:06

解答

选D
这是一个虚拟语气,虚拟语气的固定结构是主句用would.
如果我是你,我就不会这样着急.