I . Fill in the each blank with FOR or 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 tha same car.............. 1975
8 Things have changed ............ . I was a girl
9 Mr Pitt has been in hospital ...... his accident
10 The central heating has been on ........ October
11 That trunk has been in the hall ............ a year
12 He has been very ill ......... the last month
13 I've been using this machine .......... twelve years
14 We've been waiting ........ half an hour