He drove / was driving / had driven / had been driving to work when his mobile phone rang.Alex lived / was living / had lived / had been living in California for five years when he was younger.We already left / were already leaving / had already left / had already been leaving the café by 10 o'clock.We chatted / were chatting / had chatted / had been chatting for about an hour when Gordon arrived.At 11 o'clock last night I watched / was watching / had watched / had been watching TV.Mathew started / was starting / had started / had been starting work at 9 o'clock this morning.I spoke / was speaking / had spoken / had been speaking to Gloria before she left the party the previous evening.She ran / was running / had run / had been running  all morning and she was hot and thirsty.