he regretted what he had done during during the university,he ____the chance

问题描述:

he regretted what he had done during during the university,he ____the chance
to achieve more life goals.
A.could have B.WOULD HAVE C.COULD HAVE HAD D.MUST HAVE HAD

C.COULD HAVE HAD
从上文 regretted 来看这里应该是【could have had】,表示【过去本可以】把我的机会没能把握住,所以才有日后的懊悔(regret)
请在客户端右上角评价点“满意”即可,