Q57
They have built a perfect dam across the river.
A.
Across the river a perfect dam was built.
B.
A perfect dam has been built by them across the river.
AnswerC.
A perfect dam should have been built by them.
D.
Across the river was a perfect dam.
Answer: Option B
Solution
Answer: Option B
Solution:
A perfect dam has been built by them across the river. Dam is an object so has been used and the they in the active voice has become them in the passive voice.