根据对话内容,选择最佳答案。
Chen Jie: Good morning, John. How are you?
John: Fine, thank you. Chen Jie, this is my friend Ben.
Chen Jie: Nice to meet you.
Ben: Nice to meet you, too.
John: Let's paint. I have a red crayon.
Ben: I have a green crayon and a yellow crayon.
Chen Jie: I have a blue crayon. Let's paint.
Ben: We paint a flower! It has four colours.