My mother is 92. Unless I have to be out of town, each week I take my mother to do her __21__ and visit the doctor, providing __22__ and transportation. During the week, however, she likes to go to a nearby store to __23__ some small things she needs. Last week she walked up to the store, but when she went to pay for her groceries, she was __24__ about three dollars. The only __25__ to pay for the groceries was to take off the __26__ she could do without: a bottle of rubbing alcohol（医用酒精）and a bar off soup. By taking off these, she was able to __27__ the new total to the amount of cash she had with her. At this store, people __28__ and then go off to the side to __29__ their own groceries. My mother was putting her groceries into shopping bags when a __30__ came up to her and said, "Here are the things that you __31__." handing her the rubbing alcohol and the __32__. My mother, who is never speechless, was speechless. She __33__ for the woman’s name and address so that she could __34__ her. The woman told her it was her __35__. My mother was so __36__ by her gesture that she decided to go back to the store and give the cashier（收银员）a five-dollar bill to keep on hand __37__ the same happened to someone else if they didn’t have enough __38__ for all of their groceries. So, whoever you are, thank you for the random act of __39__ that not only helped my mother out, but __40__ too.