题目内容：

Express delivery: How you can buy your groceries from a virtual supermarket

Aug, 1st, 2011 Daily Mail

A “virtual supermarket” consisting of posters of goods put on platform walls is set to be introduced at London Underground stations. Passengers “shop” by scanning QR—Quick Response—codes of the items they want to buy using their smart phones. These goods are later delivered to their home address. Supermarket giant(巨头) Tesco successfully trialed the hi-tech store in a South Korean underground station and there are now plans to bring the concept to Britain.

NYPD to Scan Facebook, Twitter for Trouble

Aug, 11th, 2011 Forbes

The New York Police Department announced it will form a new unit to search social media as part of its law enforcement(执行) efforts, responding to the criminals’ growing use of these sites to plan and celebrate illegal activities. The NYPD unit created particularly to comb social media sites like Facebook, Twitter, and BlackBerry messenger for information on planned crimes and their criminals.

Space Junk(太空垃圾) reaching “tipping point”, report warns

Sep 3rd, 2011 Toronto Sun

The amount of debris(碎片) orbiting the Earth has reached “a tipping point” for crashes, which would produce more debris that may be dangerous to astronauts and satellites, according to a US study. According to the US Space Surveillance Network, the number of orbital debris jumped from 9,949 in December 2006 to 16,094 in July 2011.

1.The “virtual supermarket” would be introduced to Britain because of            .
A. the successful experience of a hi-tech store in South Korea
B. the wide use of smart phones for scanning QR codes
C. the large varieties of goods in the supermarket
D the convenient home delivery system around London

2.we can learn from the news that            .

A. people with mobile phones can shop at London Underground stations
B. Facebook, Twitter, and BlackBerry messenger are not popular in the US
C. the amount of space junk has more than doubled in the past few years
D. more and more criminals are using social media sites for crimes

3.what does the underlined word “comb” in the second piece of news mean?
A. Create.              B. Operate.              C. Block.              D. Search.

4.The third piece of news will be in the           section of the newspaper.
A. sports              B. opinion              C. science              D. business