问题描述：
（合并句子） ICQ is a chatline.People use ICQ to have conversations.
（合并句子）
ICQ is a chatline.People use ICQ to have conversations.
People use ICQ ________ ________ _________ _________ to have conversations.
（合并句子）
ICQ is a chatline.People use ICQ to have conversations.
People use ICQ ________ ________ _________ _________ to have conversations.
问题解答：
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