after graduation ,he went on to do some of the most important scientific research ever——--after graduation ,he went on to do some of the most important scientific research ever——--b.carried out 为什么 to be carried out 不对
问题描述：
after graduation ,he went on to do some of the most important scientific research ever——--
after graduation ,he went on to do some of the most important scientific research
ever——--
b.carried out
为什么 to be carried out 不对
答
不定式表示将来时.B表示过去.
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