______ my heart still beats (心脏跳动),I will go on working for the people.
条件状语从句的引导词as long as
结合题干和选项，题干想表达的意思是只要我的心脏仍在跳动，我就会继续为人民工作，所以用as long as “只要”，故选D。
As long as the whole of our society _____ trying,we will make our skies blue again.
条件状语从句的时态。
句意：只要我们全社会继续努力，我们会使我们的天空再次变蓝。本题考查时态。as long as意为 “只要”，引导条件状语从句，符合 “主将从现” 的原则。故答案为选项A。
When you are in your school dining hall during lunchtime,you may feel lonely _____ you can find someone to have lunch with.
连词的辨析。
考查连词的辨析。句意：在午饭期间，当你在学校餐厅时，除非你能找到某人和你一起吃午饭，否则你可能会感到孤独。表示 “除非”，应用unless，相当于if…not。
Evans had a sore throat. His friend advised him _____ some hot water.
非谓语动词的用法。
考查非谓语动词。句意：埃文斯嗓子疼。他的朋友建议他喝些热水。 advise sb. to do sth. 意为 “建议某人做某事”。故选选项B。