根据对话内容，从方框中选择恰当的选项补全对话，其中有两项多余。

A：Hello．Jack speaking．

B：Hi,Jack．It's Rick．

A：

B：Very good.We are on a school trip.

A：

B：We are on the Great Wall of China now．

A：Really ? That's great．

B：It's sunny and cool．I am taking photos now．

A：Wow! Could you send me some of those photos on WeChat later?

B：No problem．

A：I'm playing games with Mark in the park．

B：OK．

A：You,too．

A．Where are you? B．Have a good time! C．How's the weather there? D．This is Jack speaking． E．How's it going，Rick? F．Are you having fun? G．What are you doing now?