answer: #Person2# had a good time at the beach last summer but cannot go there this year because of her father's business trip. #Person1# invites #Person2# to go swimming tomorrow.
documents: #Person1#: When did you last go to the seaside?
  #Person2#: Last July. We spent all our days on the beach.
  #Person1#: Did you have a good time there?
  #Person2#: Yes. We swam and dived off the rocks into the sea. We also played game on the sand.
  #Person1#: The summer vacation is coming. Will you go there this year?
  #Person2#: I am afraid I won't. My father will go to Guangzhou on business next week. He won't back until September.
  #Person1#: What a pity! How long can you hold your breath under the water?
  #Person2#: I don't know. Perhaps more than one minute.
  #Person1#: That's wonderful. Let us go swimming tomorrow in the river. Is that right?