1, The office was painted last week.
2, I was helped by a stranger.
3, The agreement was signed by six countries.
4, The bill has to be pad by him.
5, The letter ought to be sent at once.
6, Four tests have been done so far this semester.
7, Our homework is being corrected by the teacher.
8, Th accident is seen by several people.
9, The truth will be told.
10, Don't let children play with matches .
