6 Complete the sentences. Use the past continuous for the longer activity and the past simple for the shorter one.
1 Alex and Sue (watch) a film on DVD. Their friends (arrive) .
2 Marco (have) breakfast. He (have) a great idea.
3 Cristina (talk) on the phone. Her father (go) out.
4 They (walk) in the mountains. They (see) strange bird.​