----- Nội dung dịch tự động từ ảnh ----- Ex 7. Combine the sentences using relative pronouns. 1. We have a sofa. The sofa is also a bed. We have a sofa that/which is also a bed. 2. Old people would love a house with a smart safety system. Old people live alone. 3. We have a smart elevator. The elevator sends you from your car to your front door. 4. People will love these smart apartments. People care about the environment. 5. Parents will love the smart safety system. Their kids are very active. 6. The apartment has a smart garden. The smart garden helps plants grow by watering them and giving them plant food. 7. Find the hidden question.