----- Nội dung dịch tự động từ ảnh ----- Bài tập: Hoàn thành câu sử dụng "When" hoặc "While".
1. I was walking home last night. It started to rain. 2. I was studying for my exam. My phone rang three times. 3. I was walking to the park. I saw my friend. 4. I was (while) 5. They were playing basketball. It started to rain. 6. Viết lại câu sử dụng "When" hoặc "While".
