题目

 语法填空 In 2013, a lot of people were shocked by a news photo of a dead polar bear that (find) on Norway's Arctic island of Svalbard, far from its habitat. All that remained of the poor bear were "skin and bones". Experts claimed that low sea ice levels (cause) by climate change meant the bear could not hunt seals as before, so it had to travel greater distances in order to find food. This (alarm) case showed how the increase in temperature had an impact on Earth's ecology. 答案：【1】was found【2】caused【3】alarming

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