现在进行时一般疑问句 — 英语阅读题

阅读短文，回答问题。 It is Saturday morning. Kitty is at home. Her mum is watering the flowers in the garden. Her dad is cleaning the living room. Kitty's little brother is doing his homework, but he is not writing carefully. Kitty wants to play with him. She walks to him and asks, "Are you doing your homework?" Her brother says, "Yes, I am. But I can finish it in ten minutes. Then we can play basketball together!" Question: Is Kitty's brother doing his homework at that moment? Please answer with "Yes" or "No" and one more sentence from the passage as your reason.