选用方框内的句子补全对话，请将其序号填在横线上。

A. Are you helpful at home?            B. Is there a lake in the park? C. What do you often do on Saturdays and Sundays? D. What can you do?               E. Are there any bridges over the lake?

Mike:

Ben: I often play computer games.

Mike:

Ben: Yes, I am.

Mike:

Ben: I can wash clothes and clean the room.

Mike: Great! You're helpful!

Ben: What about you?

Mike: I often go to a nature park.

Ben: Really? It's cool!

Mike: Yes. And there are many flowers near the lake.

Ben:

Mike: No, there are no bridges. But there are some boats on the lake.