A) 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 _____ (pained/was painting) a picture at 10 o'clock in the morning.