从方框中选择恰当的选项把对话补充完整，把标号填在题中横线上即可。
Bob: Are they ____?
Zhang Hong: Yes, they are. They're very ____. I like them very much.
Bob: Me, too. But I ____ white whales best.
Zhang Hong: Why?
Bob: They're very kind and friendly ____ people. They're clever, too.
They can sing and dance.
Zhang Hong: Listen! Are they ____ now?
Bob: Yes, they are.
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