【参考答案】

51 A King penguins in the Antarctic will be on the verge of dying out.

52 C Industrial fishing and climate change could be fatal to certain Antarctic species.

53 D The majority of them may have to find new breeding grounds in the future.

54 A Many baby king penguins can’t have food in time.

50 D Only a few of its islands can serve as huge breeding grounds for king penguins.

【答案解析】

51. 根据题干中的定位词及时间线索a new study; 2100回文快速定位到文章中的第一段第一句，该句中出现的by the end of the century刚好能匹配原文中2100年，同时出现复现信息a new study。因此通过精读该句Antarctic could see King penguin populations pushed to the brink of distinction比对四个选项，A选项中on the verge of dying out.与定位句to the brink of distinction是同义替换，B选项海平面的上升不属于定位信息，C选项冰川的融化文中也没有提及，D选项未收污染的水将会消失属于无中生有。故选择A选项。

52. 本题问的是“一个单独研究的发现”，根据题干中的定位词a separate study定位至第二段：气候变化(climate change)与商业捕鱼(industrial fishing)威胁了磷虾的数量，对企鹅，海豹和鲸的生存造成威胁。结合语义及四个选项的意思，可以确定选项C Industrial fishing and climate change could be fatal to certain Antarctic species为定位句同义替换。选项A、B、D不属于定位信息内容，属于无中生有选项。

53. 根据题干中的定位词king penguins回文定位第三段，通过引语信息可知，帝企鹅要么在2100年灭绝，要么迁移哺育地(force to relocate their breeding grounds)，结合四个选项的意思，可以确定选项D中may have to find new breeding grounds为原文信息的同义替换，其中force to与have to替换，find new breeding grounds与relocate their breeding grounds语义替换。

54. 根据题干定位词sea levels rise; Antarctic回文定位该题至文中第三段，通过倒数第二句travel further to their feeding grounds, leaving their hungry chicks for longer与选项匹配，可知A Many baby king penguins can’t have food in time为文中信息的同义替换。

50. 根据题干信息“Southern Ocean”，定位至文中第最后一句“Only a handful of islands in the Southern Ocean are suitable for sustaining large breeding colonies.”根据原文的定位信息可得知极少数的领域适合帝企鹅哺育后代。结合四个选项可以确定D Only a few of its islands can serve as huge breeding grounds for king penguins为原文的同义替换。