What does “It” refer to in the last sentence

What does “It” refer to in the last sentence 英语翻译What does the underlined word "it" Refer to in the lasts what does she mean by change in the last sentence 英语翻译who does "him" in the first sentence refer to?where did What does the last sentence mean? What does "it" refer to here?为什么要加to? What does she mean by“change” in the last sentence?这句话里的she怎 What does she mean by change in the last sentence?请问这里的chang What does the underlined word some refer to? What does the underlined word"them"refer to是什么意思? What does the expression swan song generally refer to There is a missing word in the last sentence.what is it中文