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
to achieve more life goals.
A.could have B.WOULD HAVE C.COULD HAVE HAD D.MUST HAVE HAD
问题解答：
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