Complete the sentences using the correct forms of the verbs in brackets. Use the past simple or past continuous.
(Hoàn thành các câu bằng cách sử dụng các dạng đúng của động từ trong ngoặc. Sử dụng quá khứ đơn hoặc quá khứ tiếp diễn.)
1. I first (meet)________ Lan while we (work) _________as volunteers.
2. While we (walk)________ home, we (see) _________ a girl crying near a bus stop.
3. Kim (notice) ___________the poverty of the area while she (deliver) _____ free meals to old people.
4. When I (arrive) ______at the community centre, a guest speaker (give) _________a speech.
met/were working
were walking/saw
noticed/was delivering
arrived/was giving