Воткните:а)Colin .......... (swam/was swimming ) in the swimming pool at 3

Вставьте:
а)Colin .......... (swam/was swimming ) in the swimming pool at 3 o' clock yesterday afternoon.
b) My parents .......... ( listened /were listening ) to the radio when I came into the kitchen.
c) My sister ............ ( watched / was watching ) TV when I phoned her.
d) It .......... (rained /was raining) when I left the cinema.
e)I ............. (painted/was painting) a picture at 10 o' clock in the morning.