I‘ll sgiw you a newly-built supermarket _____you may buy all_____you need

第一个是where 第二个是that,what拼不上..哦，再问你个是______very hard To work 还是By working要看在什么语境下。。。to work very hard，比如说He's goal is to work very hard, 这个意思是”他的目标是要努力工作“
而By working是说“因为很努力工作“，比如 He can achieve his goal by working very hard