شرکت در آزمون آنلاین انگلیسی نهم - انگلیسی نهم | آزمون شماره 979

What ………. for their son’s birthday now?

He … some of his friends to his last birthday party.

To make computer games, people write computer programs. People also make digital characters for the games. To make a digital character, people make a drawing. Then they use a computer to make the picture into a digital skeleton, made of lines. On the computer, people can move the skeleton and they can see it from different sides. Then they add a face, clothes, and colors. Sometimes, to help to make a digital character, people use machines called sensors. A person wears the sensors. The sensors tell a computer how the person moves, and the computer makes a moving picture of the character. Then computer programs move the characters on the screen when people play the game. People play a new game to check it. Then they sell the game on the Internet or in stores.

What is the passage mainly about?