3.a hut was seen at a distance.
⇒ We saw hut at a distance
3.the suggestion was enthusiastically welcomed by them all
⇒ They enthusiatically welcomed all the suggestion.
4. this movie has been watched by most of my friends.
⇒ Most of my friend have watched this movie.
5 the boy's work was appreciated by the teacher.
⇒ The teacher appreciated the boy's work.
6 the bicycle has been stolen.
⇒ Someone has stolen the bicycle.