dff ----- Nội dung dịch tự động từ ảnh ----- 3. Bài tập thực hành Exercise 1. Transform the following sentences into negative and interrogative forms, and answer the interrogative questions. 1. He was planting trees in the garden at 4 pm yesterday. 2. They were working when she came yesterday. 3. She was painting a picture while her mother was making a cake. 10. He
