Answer the questions.(根据短文内容，回答下列问题)

    A man named Walt Disney made a cartoon mouse that could talk in his films. He named his mouse Mickey Mouse. Soon Mickey became very popular with both young and old people. Children love to see their lovely friend, because he brought joy and laughter to them.

    In his early life Mickey made some mistakes. People were very angry. They wrote to Disney and said that they didn't want Mickey to do silly things. As there were some silly things Mickey could not do, Disney made a new animal Donald Duck. He also made a dog named Pluto. This dog always does silly things and makes mistakes.