多亏中国的好政策, 那个贫困家庭过上了幸福的生活.
____ the good policy in China, the poor family has lived a happy life.
参考答案：Thanks to.
系统解析：
Thanks to. 结合中英文是要译出多亏, 用thanks to, to是介词, 后加感谢的对象, 故答案是Thanks to.
2
因为水严重受到污染, 所以池塘里的鱼死光了.
The fish in the pond have ____ because the water was polluted seriously.
参考答案：died out
系统解析：
died out 通过中英文句子的比对, 可知英文句子中缺少"死光"的表达. 短语"死光"的英文表达是die out, 根据汉语表述结合设空处前面的助动词have判断主句用的是现在完成时, 现在完成时的构成是: 主语+have/has+动词的过去分词; die的过去分词是died, 故答案是: died out
