Заполните пропуски, употребив for или since.
1.We've been fishing _________ two hours.
2.I've been working in this office ________ a month.
3.They've been living in France _________ 1970,
4.He has been in prison _________ a year.
5.I’ve known that _________ a long time.
6.That man has been standing there _________ six o’clock.
7.She has driven the same car _________ 1975.
8.Things have changed _________ I was a girl.
9.The kettle has been boiling _________ a quarter of an hour.
10.The central heating has been on _________ October.