Fill in the article (a/an,the) where it is necessary.1. .... Mark Twain is famous for his book "The Adventures of Tom Sawyer2. .... Smiths have... dog and ... cat.3. "Is this your ... friend?"-"No , it is not my ... friend, it is my sister"
Mark Twain is famous for his book "The Adventures of Tom Sawyer.The Smiths have a dog and a cat."Is this your friend?" - "No, it is not my friend, it is my sister."