Choose the best answers to the questions What's your name? I'm Martin. I'm 10 years old. Who's he? She's my sister. He's my brother. What's this? This is a school bag. My father's name is Jack. Who are they? They're my grandparents. It's my new computer. How old are you? I'm 11 years old. I have got 11 pencils. What's it? It's my cat. They're my cats.