be going to 表达将来计划 — 英语阅读题

阅读短文，回答问题。 Lily and Ben are talking about Friday. Lily is going to visit the school library after school. She is going to read a book about space, but she is not going to take a book home. Ben is going to meet his cousin at the school gate. They are going to make a small model plane at Ben’s home. Ben is not going to play football that afternoon. Lily wants to see the model plane on Monday. What are Lily and Ben going to do after school on Friday?