rewrite the following in the passive voice
a) they have pulled down the old building.
b) the president appointed him governor
c) she kept us waiting
d) we refused them admission
a) The old building has been pulled down.
b) He was appointed Governor by the President.
c) We were kept waiting.
d) They were refused admission by us.
b) He was appointed Governor by the President.
c) We were kept waiting.
d) They were refused admission by us.