选择合适的句子，补全对话。

A. Here's a call for you. B. I often go fishing. C. I'm playing the guitar and singing. D. Can I speak to him? E. What time? F. This is Jack. G. Who's that? H. Thank you. I. What about playing ball games this Saturday? J. What's your brother doing?

Tom: Hello.

Jack: Hello. What are you doing, Tom?

Tom:

Jack: That's great!

Tom: He's writing an email on the computer in his study.

Jack: OK.

Tom: Hold on, please. Tim! Tim!

Tim: I'm coming.

Tom: Your friend, Jack.

Tim:

Tom: You're welcome.

Tim: Hello, Jack?

Jack: Hello! What do you usually do on the weekend?

Tim:

Jack:

Tim: Good idea!

Jack: At about 8:30.

Tim: OK. Goodbye.

Jack: Bye!