Помогите пожалуйста не могу сделать номер 6 Знатоки не проходите мимо!! !!Срочно!

1.It has been snowing all day. When ....2.Hi Tom! I have not seen you for weeks.What have you been doing all this time?3.I have written them...but i have not got any...4.Bill has been here..5.I have met...