Use the correct from of the in brackets. Past simple of past continuous. 1) While he ___ (walk) his dog, he ___ (meet)

a) 1) While he was walking his dog, he met his old friend. 2) Yesterday I got up at 6 am. 3) We were watching the film when somebody knocked on the door. 4) We were watching TV while our mum was baking a cake. 5) He was writing the test at 3 pm yesterday.

b) 1) Jill\'s a far more intelligent person than my brothers. 2) Jack was the tallest of the two. 3) The deposits of oil in Russia are by far the richest in the world. 4) Greg felt worse yesterday than the day before. 5) Which of these two performances did you enjoy most?