1. We (decide) decided to form a volunteer club while we (prepare) were preparing for our group presentation about people in need.
2. When we (arrive) arrived at the gate of the primary school at 5:30 p.m., lots of children still (play) were playing in the playground.
3. I (decide) decided to talk with some of the children while we (wait) were waiting for other group members.
4. While I (have) was having a chat with Amy, her mum (ring) rang to say she would come home late.
5. While we (have) were having a discussion about how to help the children, we (agree) agreed to organise some after-school activities for them.
6. When An's father (come) came to pick her up after school, I (help) was helping An with her homework.
7. While we (present) were presenting our volunteer project, the audience (raise) raised a lot of questions.
8. He (get) got a phone call from a club member while he (write) was writing the club's programme for the next month.