Choose the correct option to complete the sentences.

0 What were you doing / did you do when I called / was calling you last night?

1 My brother fell / was falling when he skateboarded / was skateboarding with his friends

yesterday.

2 My grandma crossed / was crossing the street when she met / was meeting her neighbour.

3 I played / was playing basketball when I twisted / was twisting my knee.

4 We bought / were buying some sweets when our mum phoned / was phoning us.​