____,the deer immediately went away.A.Observing B.Haying observedC.On being observed D.To be observed

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____,thedeerimmediatelywentaway.A.ObservingB.HayingobservedC.OnbeingobservedD.Tobeobserved____,thede

____,the deer immediately went away.A.Observing B.Haying observedC.On being observed D.To be observed
____,the deer immediately went away.
A.Observing B.Haying observed
C.On being observed D.To be observed

____,the deer immediately went away.A.Observing B.Haying observedC.On being observed D.To be observed
C.On being observed 为正确选项.
on doing sth,“一.(就.)”的意思,=as soon as,因为句子的主语the deer和observe之间是被动关系,故用动名词的被动语态being observed.