在下面短文的空处用动词be的适当形式填空。
Hello, everyone. I _____ (1) a girl. My name _______(2) Mary. Those ___(3)my e-dogs. What colour _______(4) they? Oh, they _______(5) yellow. Yellow _______(6) my favourite colour. Look at this picture. What _______(7) in the picture? There ________(8) two boys in it. The two boys and I _____(9) in the same class. The tall boy ___(10) Daniel. He __(11) American. We ___ (12) good friends.