A：Hello，this is Jack speaking in Beijing．May I （76）　　？

B：Hey，this is Amy．（77）　　？

A：I am visiting my aunt．I am calling to say good luck to you about your graduation exam．

B：（78）　　．Have you ever been to Badaling？

A：（79）　　．I went there yesterday．

B：（80）　　？

A：I will be back in 6days．

B：See you then．

A：OK，see you!