当一个半永久终端被加入一个特定关联时，它是从（）关联中获取，而当从特定关联中删除时，它又被返回到（）关联。 A: ANULL B: BCHOOSE C: CALL

Text BChoose the best answer to each of the following questions according to what is stated or implied in the text.The function of Paragraph 4 is to . A: state the thesis of the passage B: serve as a summary of the above three paragraphs C: play the role of transition D: express the author’s own view on personal branding