試卷：無年度 - 2003年1月托福閱讀#20900
| 科目：TOEFL(Test of English as a Foreign Language)托福
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試卷名稱：無年度 - 2003年1月托福閱讀#20900
科目：TOEFL(Test of English as a Foreign Language)托福
20. What does the passage mainly discuss?
(A) The history of surveys in North America
(B) The principles of conducting surveys
(C) Problems associated with interpreting surveys
(D) The importance of polls in American political life
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