补全对话。根据上下文提示，在空白处填上合适的句子。（共5小题；每小题2分， 满分10分） (A—Linda,  B—Tom) A: Hi! Tom. Nice to meet you at this store. B:小题1: . I need to buy a birthday gift（礼物）for my best friend, Jack. A:小题2:______________________________________? B: It’s on January 27th. I plan（计划）to have a birthday party for him this Sunday. 小题3:______________________________________? A: Yes, I do. He is also my best friend. B: Can you help me with the gift? I don’t know what to buy for him. A: OK小题4:______________________________________? B: Sounds good. He likes playing soccer very much. Look! Here’s the price tag（标签）of the soccer ball. A:小题5:______________________________________? B: It is $60. It is cheap（便宜的）. I’ll take it. I think Jack must like it.