chuyển sang câu bị động ạ -0. Who are they keeping in the kitchen? 1. How can they open this safe? 2. What books are people reading this year? 3. How did the police find the lost man? 4. Who look after the children for you? 5 . How long have they waited for the doctor? -6. What time can the boys hand in their papers? 7. Who lend you this book? 8. How many marks does the teacher give you?