Поставьте косвенное дополнение после глагола и уберите предлог например She gave a letter to the postman she gave the postman a letter.
1. Victor wrote a letter to his mother. 2. I'll send the books to you. 3. He brought the book to her this morning. 4. She wrote a letter to her brother. 5. My sister sent a letter to my daughter. 6. He showed the books to me. 7. They wrote a letter to us

1.Victor wrote his mother a letter 2.I'll send you the books. 3. He brought her the book this morning. 4. She wrote her brother a letter. 5. My sister sent my daughter a letter. 6. He showed me the books. 7. They wrote us a letter.