【推荐1】Scientists have been exploring whether life _____ (存在) on other planets. (根据汉语提示单词拼写)

【推荐2】The whole family can’t _________ (生存) on the money he is earning. (根据汉语提示单词拼写)

【推荐3】One can hardly guess the close relationship that__________(存在) between us. （根据汉语提示单词拼写）

【推荐1】He found it difficult to _________(呼吸) at high altitudes. (根据汉语提示单词拼写)

【推荐2】We plan to ________ (扩大) the business by opening two more stores. （根据汉语提示单词拼写）

【推荐3】Recognizing the urgent need to protect and r_________ nature, the Kunming-Montreal Global Biodiversity Framework (GBF) has emerged as a pivotal (中枢的) instrument in safeguarding the planet's ecological treasures. （根据首字母单词拼写）