6. D)。根據倒數第四段“Mechanical Turk users have an independent site called Turker Nation (turkers.proboards80.com), which reviews the companies that solicit and pay for tasks so that workers can check a company’s record before taking on a task.”可知，Turker Nation是一個專門提供公司業務需求信息和支付情況的網站，網絡“專家”在為某家公司提供服務之前，可以對這家公司的業務記錄有一個了解。

　　7. C)。根據倒數第二段第二句可知，Ms. Knutson目前將大部分時間用于為客戶轉錄網絡視頻和音頻。

　　8. apply for financial aid。參見第五段最后一句“Associated Content pays contributors to write articles on a wide range of subjects, from organic flower gardening to how to apply for financial aid.”可知，Associated Content網站向人們征集稿件，稿件涉及的范圍很廣，從建造生態花園到申請經濟援助。

　　9. community reviews。參見第七段“LivePerson says it vets contributors’ qualifications, such as medical licenses or financial certification, through a third party, and relies heavily on its community reviews.”可知，LivePerson對這些在網上用知識和技術賺錢的人會進行審核，例如行醫許可或經濟師證書等，通過以社區論壇為主的第三方進行認證。

　　10. 100 different countries。參見第十四段“Amazon says that MTurk now has 200,000 workers from 100 different countries ...”可知，MTurk現在有來自100個國家的20萬名“網絡員工”。

　　Part III Listening Comprehension

　　11-15 CABCA 16-20 BCDBD

　　21-25 CDCCA 26-30 BDBBD

　　31-35 BBDCA 36. traps

　　37. insects 38. infections 39. European 40. sticky

　　41. expelled 42. harden

　　43. interferes

　　44. People can also cause a blockage when they try to clean out their ears — but only push the wax deeper inside

　　45. They say the wax can be softened with mineral oil, or ear drops

　　46. Use a device to gently direct water against the wall of the ear canal

　　Tape Script of Listening Comprehension

　　Section A

　　Directions: In this section, you will hear 8 short conversations and 2 long conversations. At the end of each conversation, one or more questions will be asked about what was said. Both the conversation and the questions will be spoken only once. After each question there will be a pause. During the pause, you must read the four choices marked A), B), C) and D), and decide which is the best answer.