15. Christine is ________ about anything but her dress as she doesn’t really care about what she looks like in the eyes of others.

　　A. cautious B. optimistic

　　C. particular

　　D. curious

　　【解析】选C。考查形容词辨析。句意: Christine对她所穿的衣服根本不在意, 因为她真的不在乎别人怎么看她。cautious谨慎的, 小心的; optimistic乐观的; particular挑剔的, be particular about对……挑剔; curious好奇的。anything but除……之外任何事(物)都……, 根本不……。

　　. 阅读理解

　　Now scientists believe that global warming affects hibernating animals, causing them to wake up earlier. While this may seem a little concern, it is in fact a significant environmental problem. The shortened hibernation period could actually lead to significant declines in the population of several species.

　　Some of the first concrete evidence of the phenomenon came from Colorado, where researchers at the Rocky Mountain Biological lab have been observing marmot(旱獭)hibernation behavior since the 1970s. In the early days of their studies, marmots generally hibernated several weeks into the month of May. Nowadays, however, temperatures in the area have risen by 2. 5 degrees Fahrenheit, and the marmots wake up about a month earlier.

　　At least the marmots are still hibernating. Several other animals have not been hibernating at all recently. Brown bears in the Spanish Cantabrian Mountains did not hibernate last year. In parts of the United States, chipmunks(花鼠)also skipped the hibernation period. The bears seem to have survived without losing many individuals. The chipmunks, however, were not so lucky. Many of the animals died of starvation during the winter.

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