Complete the sentences with the past simple or past continuous form of the verbs given. 1 while i was walking home, i (meet) my friend. 2 my parents (have) an argument when i walked into the room. 3 the students were talking all the time while the teacher (explain) the exercise. 4 what were you doing when you (hear) the news? 5 the students (write) an essay when the teacher told them to stop. 6 my mum (drive) when her mobile phone started to ring. 7 the birds (sing) when we left home this morning.