21. The structure of the passage can best be described as an interview in which the interviewee:
Your Answer is
Correct Answer is D
Explanation
Based on the understanding of the whole article, use the method of elimination to answer the questions.
Item A: It is said that the interviewee defended himself in the face of the interviewer's sharp comments, which does not match the original text.
Item B: It is said that the interviewee challenged the interviewer and asked him to ask himself relevant questions. The original text did not reflect that the interviewee was actively challenging the interviewer.
Item C: It is said that the interviewee throws the question back to the interviewer, causing a relatively casual answer. Visitors are answering questions.
So choose D, the original text is indeed a lot of abstract and complicated answers.