Task 4. Fill in the gaps with: for or since. 1. We have lived in this house.....five years. 2. The children have been in the park................ 5 o'clock this morning. 3. You have been here ............ an hour. 4. Lisa has been at this school ................ 2007. 5. Tony has been on holiday ................ last Monday. 6. I've known my best friend ................ three years.