阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在各小题所给的四个选项中，选出一个最佳选项。

Mike is an Australian boy. Now he studies in Guangzhou. He is 1 Grade Seven. He has a dog. It's black 2 white. The dog's very clever. Mike likes it very much. 3 favorite food is the bone. Every day when Mike 4 home, the dog meets him in front of the house.

Mike's friend, Amy is 5 English girl. She is in Guangzhou, too. They are in the same grade, 6 in different classes. She has a pet panda. It's  7 a black and white one, but it 8 a real panda. It's a toy. The panda is very clean. Amy often washes 9 in water. 10 is the panda now? Oh, It's sleeping with Amy.