根据图片所提供的信息完成对话

A：What ________ you ________ this weekend?

B：I've done a lot of things.

A：Oh. Really?

B：I ________ ________ the mountain with my friends.

A：Have you ________ the trees on the mountain.

B：Yes, we have watered many trees.

A：What's the next day?

B：I ________ ________ to a concert then.

A：How do you ________ ________ ________?

B：It's very exciting.