Answer:
• They stared, wondering at his reappearance, his passion, his wild animal howling.
• It took them a minute to grasp what he was saying, even who he was.
• Having disappeared from the scene, he had disappeared from their minds
Step-by-step explanation:
From the passage given, the three sentences that suggest that the children had completely forgotten about Ravi are:
• They stared, wondering at his reappearance, his passion, his wild animal howling.
• It took them a minute to grasp what he was saying, even who he was.
• Having disappeared from the scene, he had disappeared from their minds.