Fill in FOR or SINCE
Richard has been to London FOR / SINCE a month. We have stayed here FOR / SINCE Monday. My granny has lived in Australia FOR / SINCE 15 years.Silvia has studied English FOR / SINCE 3 years already.He has been in hospital FOR / SINCE April.Tony has been in his office FOR / SINCE half an hour. СРОЧНО ПОМОГИТЕ ПОЖАЛУЙСТА !!!