阅读下面短文，然后根据短文内容回答问题。 This is Lin Tao. He can read and write English dialogues. He's eleven.He is fine. This is his sister Lin Lan. She is an English teacher She's twenty She is fine,too This is an old man.We don't know his name. 1. Who's this boy? __________________________ 2. How old is he? __________________________ 3. What's his sister's name? __________________________ 4. How ale they? __________________________ 5. Do you know the old man? __________________________