[填空题]SummarizationRead each of the following short paragraphs and complete the phrase or sentence that expresses the main idea of the paragraph. The first letter of the missing word is given before the blank.Paragraph 3.When he was once accustomed to it he never parted from it more, but dragged it after him wherever he went. If by any chance it was lost, the whole camp knew it by his howls; and sometimes I had to send people to look for it when he had mislaid it on some forest excursion, so that he would stop his noise. He slept on it always, coiled up into a little heap, and only relinquished it when I gave him permission to accompany me into the woods.3.To be f______of the pillow.