单选题. Questions 19 to 21 are based on the passage you have just heard.4.

单选题. People are being lured (引诱) onto Facebook with the promise of a fun, free service, without realizing they're paying for it by giving up loads of personal information. Facebook then attempts to make money by selling their data to advertisers that want to send targeted messages. Most Facebook users don't realize this is happening. Even if they know what the company is up to, they still have no idea what they're paying for Facebook, because people don't really know what their personal data is worth. The biggest problem, however, is that the company keeps changing the rules. Early on, you could keep everything private. That was the great thing about Facebook—you could create your own little private network. Last year, the company (:hanged its privacy rules so that many things—your city, your photo, your friends' names—were set, by default (默认), to be shared with everyone on the Internet. According to Facebook's vice-president Elliot Schrage, the company is simply making changes to improve its service, and if people don't share information, they have a "less satisfying experience." Some critics think this is more about Facebook looking to make more money. Its original business model, which involved selling ads and putting them at the side of the page, totally failed. Who wants to look at ads when they're online connecting with their friends? The privacy issue has already landed Facebook in hot water in Washington. In April, Senator Charles Schumer called on Facebook to change its privacy policy. He also urged the Federal Trade Commission to set guidelines for social-networking sites. "I think the senator rightly communicated that we had not been clear about what the new products were and how people could choose to use them or not to use them, " Schrage admits. I suspect that whatever Facebook has done so far to invade our privacy, it's only the beginning. Which is why I'm considering deactivating (撤销) my account. Facebook is a handy site, but I'm upset by the idea that my information is in the hands of people I don't trust. That's too high a price to pay.1. What do we learn about Facebook from the first paragraph? ______

单选题. Questions 12 to 15 are based on the conversation you have just heard.5.

单选题. Questions 16 to 18 are based on the passage you have just heard.1.

单选题4. Scientists study ______ human brains work to make computers.

单选题. Questions 3 and 4 are based on the news report you have just heard.3.

单选题 "I'm a little worried about my future"

单选题 "Sugar, alcohol and tobacco

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单选题《复合题被拆开情况》 Remote work is about more than just working from home—it means working differently. Organizations should reconsider the appropriateness of their performance evaluation procedures in light o

单选题A third of the planets land is severely degraded and fertile soil is being lost at the rate of 24bn tonnes a year，according to a new United Nations-backed study that calls for a shift away from d

单选题. Questions 1 and 2 will be based on the following news item.1.