从A~G选项中选出能填入空白处的最佳选项补全对话。（选项中有两项是多余的）
A: Hi, Lucy! The cat in the photo is so cute. Whose is it?
B:____51____
A: I love its round face.____52____
B: It's called smart.
A: Why?
B: Because it's really smart.____53____
A: How amazing! Then that's a good name for it!____54____
B: Five years old. By the way, do you have a pet?
A:____55____My mother worries that keeping a pet will bring me a lot of trouble.
B: Actually, pets can bring you lots of pleasure. I hope you will have a pet one day in the future.
A. Yes, I have a pet, too.
B. It can even play the guitar.
C. It's my pet cat.
D. No, I don't have one though I love pets too.
E. How old is it?
F. What’s its name?
G. It's kind of silly.
本段对话主要是二人在讨论照片中的猫，以及猫的长相、名字、年龄等。
51.C【解析】句意：它是我的宠物猫。根据前句“The cat in the photo is so cute. Whose is it?”可知，前句在询问照片里的猫是谁的，所以此处应回答是谁的猫。结合选项，故选C。
52.F【解析】句意：它的名字是什么？根据后句“It's called smart.”可知，猫叫做斯玛特，所以前句在询问猫的名字是什么。结合选项，故选F。
53.B【解析】句意：它甚至会弹吉他。根据前后句“Because it's really smart.”和“How amazing!”可知，此处应在描述猫具体怎么样聪明，做了什么让人觉得它聪明。结合选项，故选B。
54.E【解析】句意：它多大了？根据答语“Five years old.”可知，答语说它五岁了，所以前句是在问猫几岁了。结合选项，故选E。
55.D【解析】句意：没有，虽然我也喜欢宠物，但我没有。根据“By the way, do you have a pet?”和“My mother worries that keeping a pet will bring me a lot of trouble”可知，前句在询问是否养了宠物，所以答语应回答是否养了，再根据“我妈妈担心养宠物会给我带来很多麻烦”可知，没有养宠物。结合选项，故选D。