Read the following article and select the best answer. Article: WASHINGTON--Two-thirds of the world's polar bear population could be gone by 2050 if predictions of melting sea ice hold true, the US Geological Survey reported on Friday. The fate of polar bears could be even worse than that estimate, because sea ice in the Arctic might be disappearing faster than the available computer models predict, the geological survey said in a report aimed at determining whether the big white bear should be listed as a threatened species. "There is a definite link between changes in the sea ice and the welfare of polar bears," said Steve Amstrup, who led the research team. He says Arctic sea ice is already at the lowest this year and is expected to retreat farther this month. That means that polar bears--some 16,000 of them -- will disappear by 2050 from parts of the Arctic where sea ice is melting most rapidly, along the north coasts of Alaska and Russia, researchers said in a telephone briefing . Other polar bears could survive beyond that date but many of those could be gone by 2100, Amstrup said. By this century's end, the only polar bears left might live in the Canadian Arctic islands and along the west coast of Greenland. "It is likely to result in loss of approximately two-thirds of the world's current polar bear population by the mid 21st century," the report's executive summary said. "Because the observed trajectory of Arctic sea ice decline appears to be underestimated by currently available models, this assessment of future polar bear status may be conservative ." In January, the US Fish and Wildlife Service proposed listing the polar bear as a threatened species, noting polar bears depend on sea ice as a platform to hunt seals, their main food. Without enough sea ice, polar bears would be forced onto land, but they are poor hunters once they get out of the water and ice, the researchers said. The bears' disappearance would probably take place as young cubs failed to survive to adulthood and females were unable to reproduce successfully. Question: The key to preventing polar bears dying out seems to _ . - help young polar bears to survive the cold winter - have large number of seals living in the oceans - make sure there is enough sea ice in the Arctic - provide chances for adult polar bears to reproduce
make sure there is enough sea ice in the Arctic

(Question)
Read the following article and select the best answer. Article: Facebook means never having to say goodbye. The social media website has earned a reputation for reconnecting old friends. Last week, a guy whom I hadn't seen since my bachelor party five years ago sent me a friend request. I accepted and waited for "Easy E" to send me a greeting of some kind. He had sought me out, after all. I learned from his profile that he was in a relationship and had a son. However, I'm pretty sure we won't ever write wall-to-wall, let alone e-mail each other. But he'll remain a friend of online until one of us makes a point of removing the other from his official list. My pool of friends consists of family members, college buddies, co-workers from past and present, and friends of friends. There are 35 in all. If I spent some time uploading old e-mail addresses, I'm confident that I could increase my friend count actually. A person could make a mission out of reconnecting with childhood friends, former classmates, distant cousins, and those one would like to get to know better. And some people can even handle hundreds of on-screen relationships, keeping up with the daily happenings of their small army of companions. After all, there are worse fates than having too many friends. Thanks to e-mail, the inability to schedule face-to-face meetings no longer means a friendship must come to a close. But even with e-mail, people will lose touch if one or both parties stop writing back. That's normal. People move from school to school, job to job, city to city. You never have to feel guilty for breaking away. Every day, the masterminds of Web 2.0 find new ways of making human communication easier. _ . Some things shouldn't be simplified. When it comes to friendship, there can be no shortcuts. Question: Which of the following statements is NOT true? - The author communicates with all the 35 friends by e-mails. - There are 35 people in the author's list of friends right now. - The list of 35 friends doesn't include the old e-mail addresses. - It is not difficult for the author to increase his friend count.
(Answer)
The author communicates with all the 35 friends by e-mails.

Read the following article and select the best answer. Article: One day several years ago,Josie went to collect her sister from her local Harvester pub in Brentwood,Essex,where they both worked.A few men came up with gulls in their hands.The robbers then tied up their arms and legs and told them to get down on the ground,while they _ the restaurant,fleeing withPS1,000. "As I lay on the ground I felt helpless and ashamed as they took time out to laugh at me,calling me fat cow,''Josie said.Shortly after that she was able to untie herself and raise the alarm,but it was just the beginning of her nightmare. "I was too terrified to go back to work,so I had to leave.I slept with the light on for more than a year.My confidence was totally destroyed.At school people would call me fatty and shout nasty things.When the robber called me fat that night,it just brought all those horrible memories back.''Over the next few months Josie ate more and piled on more pounds as she tried to cope with the sufferings. Two years went by and Josie stuck to the same bad habits,which worried her family a lot.In order to wipe the cloud off and cheer her up,her sister suggested a trip.It wasn't until returning from the family holiday on the island of Aruba that she decided to take action once and for all and signed up for Weight.Watchers the next day with her sister. Eighteen months 1ater,a slimmer and happier Josie flew to Turkey in summer in 2012 with her family,where she met sailor Fatih,26,at a party and the pair:plan to get married next summer."If you had told me three years ago that I would be marrying a handsome Turkish man, and looking for a size 10 wedding dress,I would have never believed you." Question: It can be inferred from the text that _ . - Josie was a slim girl when she was in school - Weight Watchers is a slimming organization - Josie got fired by the pub after the incident. - Josie had a wonderful and impressive school life
Weight Watchers is a slimming organization