A.Across the river a perfect dam was built.
B.A perfect dam has been built by them across the river.
C.A perfect dam should have been built by them.
D.Across the river was a perfect dam.
Show AnswerAnswer=Option B
A.Across the river a perfect dam was built.
B.A perfect dam has been built by them across the river.
C.A perfect dam should have been built by them.
D.Across the river was a perfect dam.
Show AnswerAnswer=Option B