A：Hello，Dad．I have come back home．（81）　　？

B：I'm in the supermarket now．What's up？

A：Er，it's a special day today，isn't it？

B：（82）　　．It's Father's Day．

A：Do you have a plan？

B：Not yet．（83）　　？

A：What about spending the day with my grandpa？

B：Good idea．What can I buy for him？

A：（84）　　．His sports shoes are too old．

B：OK．Then wait for me at home．

A：（85）　　？

B：I will be back in an hour．