根据对话内容，在每个标有题号的空白处填入一个适当的句子，使对话完整，合乎情景。

A: Hello, Lucy. May I ask you some questions?

B: Sure. What are they?

A: I hear you like collecting stamps. 小题1:                                     

B: Since I was ten years old.

A: 小题2:                                      

B: Because I can learn a lot of history and culture from them.

A: 小题3:                                     

B: I have had 500 stamps.

A: 小题4:                                        

B: I put them on my shelf.

A: 小题5:                                      

B: Yes, my parents allow me to practice my hobbies as much as I want.

A: Thank you.

B: You’re welcome.

路中心的黄色斜线填充是何含义？（）

A．可跨越对向车道分界线

B．双侧可跨越同向车道分界线

C．禁止跨越对向车行道分界线

D．单向行驶车道分界线