【推荐1】Higher education i________ are a source of brain power for the development of a countries, hatching innovative projects and sending experts to the industries. (根据首字母单词拼写)

【推荐2】The former___________ (宇航员) says he would like to go back to the moon to see how the American flag he and Neil Armstrong planted there is doing. （根据汉语提示单词拼写）

【推荐3】“The l__________（关系）between sleep and health, and bad sleep and disease is becoming clearer and clearer,” says Lawrence Epstein, a sleep expert at Harvard University. (根据中英文提示单词拼写)