Exercise 1: Tìm lỗi sai và sửa lại 1. I've lost my key. I can't find it anywhere. 2. Have you eaten a lot of sweets when you were a child? 3. I've bought a new car. You must come and see it. ........... 4. I've bought a new car last week. ........... 5. When have you been yesterday evening? ........... 6. Lucky has left school in 1999. ........... 7. I'm looking for Mike. Have you seen him? ........... 8. Have you been to Paris? "Yes, many times" ........... 9. I'm very hungry. I haven't eaten much today. ........... 10. When has this book been published. ...........