Ответ:

Model: Anna had dinner at the restaurant by herself. "By herself" means that she was having dinner alone. There wasn't anybody else at the table. 1. You shouldn't go there by.... yourself 2. The dog came home by.... itself 3. They went on a holiday by.... themselves 4. I don't like eating by ... myself. 5. She cooked the dinner all by.. herself. 5. Did the two of you do this by.... yourselves 7. Harry lives by.... himself 8. We'll build the house by.... ourselves