51.It’s been two years since I stopped doing competitive sports. → I haven’t _______________________________________________________. 52.I have never met such a beautiful girl before. → It ______________________________________________________________. 53.He has worked for this company for more than 15 years. → He started ________________________________________________________. 54. The train has left for one hour. → __________________________________________________________ ago. 55. I last saw Scott last Sunday. → I have ______________________________________________________________.

51.It’s been two years since I stopped doing competitive sports.

→ I haven’t ___done competetive sports for 2 years____________________________________________________.

52.I have never met such a beautiful girl before.

→ It _____is the first time I have met such a beautiful girl_________________________________________________________.

53.He has worked for this company for more than 15 years.

→ He started ___working for this company more than 15 years ago_____________________________________________________.

54. The train has left for one hour.

→ ________The train left an hour ago.

55. I last saw Scott last Sunday.

→ I have _____not seen Scott since last Sunday_________________________________________________________.