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  • 1. (2023高一下·山东月考) 阅读下面短文,在空白处填入1个适当的单词或括号内单词的正确形式。

    Twin giant pandas have been born at a breeding (繁殖) center in southwestern China,  sign of progress for the endangered species as they struggle for survival due to occupation on their land by agriculture  industry.

    The male and female baby pandas, born on Tuesday at the Qinling Panda Research Center in Shaanxi Province, are the second pair of twins born to  (they) mother, Qin Qin. She was also born at the center and  (previous) gave birth to twin females in 2020.

    Chinese researchers for years have been working  (boost) the population of the animals,  reproduce rarely in the wild and rely on a diet of bamboo in the  (mountain) of southwestern China.

    The efforts have paid off, with some captive-bred pandas being released into the wild. The population of wild pandas  (increase) over the past few years,  (reach) an estimated 1,800. About 500 others live in zoos and reserves, while the  (major) live in the mountainous, heavily forested province of Sichuan.

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