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Theoldscientist,alotofachievementsinthepast40years,isnowexploringanotherfieldofphysics.A.tomakeB.makingC.tohavemadeD.havingmade说明理由,

题目详情
The old scientist,______a lot of achievements in the past 40 years,is now exploring another field of physics.
A.to make B.making C.to have made D.having made
说明理由,
▼优质解答
答案和解析
D.having made
表示对现在的影响有用完成是,又因为The old scientist,是have是的逻辑主语所以用ing