He has been living here fifteen years. a on b since c for peter was watching a documentary when the phone . a rings b rang c have rang i went to berlin two years . a since b before c ago we bought some crayons from the shop a home ware b stationery c jewellery bob argued his brother over the football match. a from b by c with we take photos in the museum. it's not allsowed. a mustn't b must c should if you wake up early, you late for work. a be b aren't being c won't be you all night. you must be exhausted. a 'vestudied b are studying c 've been studying
