**完整历年六级试卷pdf版本下载打印，请去V-X-搜-公-众-号“：多学英语**
1、听力选项：
Questions 12 to 15 are based on the passage you have just heard.
12. A) Farmers helped Native Americans grow crops. C) There existed post offices.
B) There were expansive university campuses.
D) Migrants found gold there.
13. A) It helped to boost the economy in the American West.
B) It provided job opportunities for many gold seekers.
C) It extended the influence of the federal government.
D) It kept people in the deserts and plains connected.
14. A) It employed Native Americans to work as postmen.
B) It commissioned private wagons to carry the mail.
C) It subsidized the locals who acted as postmasters.
D) It centralized postal services in its remote areas.
15. A) He analyzed interactive maps of mail routes.
B) He read a large collection of books on the topic.
C) He examined its historical trends with data science.
D) He collected data about its impact on local business.
2、听力原文（点击图片放大）和答案解析：CDBC
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