----- Nội dung ảnh ----- **UNIT 4** Complete the sentences using the correct past simple or past continuous forms of the verbs in brackets: 1. We (decide) to form a volunteer club while we (prepare) our group presentation about people in need. 2. When we (arrive) at the gate of the primary school at 5:30 p.m., lots of children (wait) in the playground. 3. I (decide) to talk with some of the children while we (chat) with Amy, her mum (ring) . 4. While I (have) a discussion about how to help the children, we (agree) .
