Put the sentences into the Passive , make the words in italics the subject of the passive construction.
1) Suddely we lost sight of (the man) who was going ahead of us
2)The headmaster always finds fault both with (the pupils and the teachers)
3)I haven't made use of (this pen) yet.
4)your companions will make fun(you) if you say that
5)the children made a lot of fun of (the boy)