结构推理 Dr. McKinley broke his neck to make the public aware of the grave environmental problems.
【正确答案】麦肯立博士竭尽全力唤起公众对严峻的环境问题的关注。
【答案解析】[翻译指导] break one's neck字面意思为“拧断脖子”，这里引申为“竭尽全力”。