ProfessorSmithissaidanotherimportantdiscoveryinchemistry.a.havingmadeb.havingbProfessorSmithissaidanotherimportantdiscoveryinchemistry.a.havingmadeb.havingbeenmadec.tohavemaded.tomake

Question

Professor Smith is said ______ another important discovery in chemistry.a.having made b.having b
Professor Smith is said ______ another important discovery in chemistry.
a.having made b.having been made c.to have made d.to make

Answer 1

make discovery 是一个短语.其中的have 只能做时态来看 应该是A吧
having done