Detailed Instructions: In this task, you're given an article and an answer. Your task is to generate the fill-in-the-blank question for this answer based on the given article. The blanks are always at the end of the question, and can be filled with more than one word or phrase.
Problem:Article: Billy's favorite color is orange. But he can't see what orange looks like. Billy is blind. A month after he was born, his mother noticed that his eyes weren't quite as big as a normal baby's."Billy would never be able to see." the doctor told his mother. After that Billy's mother began talking to him, describing things she saw outside the window. She described everything to him. Billy does not only depend on his mother's descriptions to learn about the world around him. He sees with his ears and his hands, too. He has perfect hearing. When people make phone calls, he can tell the numbers they dial . Billy loves computer science. He began teaching himself computer programming when he was just seven years old. His dream school would be Stanford University. He gets top grades in his classes, making that a real possibility. "You can't let excuses get in the way of your dreams, and if you do that you can't move forward and reach your goals, "said Billy.
Answer: Billy can't see.
Solution:
From the passage, we know that _