Read the senetences and complete them with “since” or “for”: 1. I have worked here __________ 2007. 2. They have swum __________ about 5 years. 3. Where have you lived _________ you arrived in this city? 4. He has smoked __________ 10 years or so. The correct sequence is: since – since – since – for for – since – for – since for – for – for – since since – since – for – for since – for – since – for