5 A: What ........ yesterday afternoon? B: She ........ (make) a cake with her mum.

1. The first blank requires the past continuous to ask about an action in progress at a specific time in the past: 'was Tina doing'.
2. The second blank requires the past continuous to describe an action that was in progress when another event occurred: 'was making'.

A: What was Tina doing yesterday afternoon? B: She was making a cake with her mum.