第23题: [单项选择]The author thinks that pull factors______ A. are all related to economic considerations B. are not as decisive as push factors C. include a range of considerations D. are more important than push factors 参考答案:C 答案解析:本题询问细节,根据提示词“pull”可在文章第三段找到相关信息。通读本段可知, “pull factors”包括很多内容,如经济的、血缘的等等。
第28题: [单项选择]What does the word "bidder"( in paragraph 1 ) mean A. a person who sells something. B. a person who buys something. C. a person who offers a price. D. a person who borrows something 参考答案:C 答案解析:[精解] 从文章第一段"bid"的意思即“make offers(出价)”可知,“bidder'’是出价者、竞标者的意思。