1 Her old firiend was visited last month.
2 These dolls have been bought by the children.
3 She said she is a doctor.
4 She asked me if I stayed at home.
5 She has two years of teaching english.
  II:
2 I have worked in this company for 1995 => I have worked in this company in 1995.
3 Mary asked Nancy if she live with her family => Mary asked Nancy if she lived with family.
4 You should learned how to use the computer => You should learn how to use the computer.
  Chúc bạn học tốt.