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语言朋友(62)ling.The past few weeks have been rather __1__， but when a large number of smile cards arrived in my mailbox the other day, having traveled from the United States to my home in the Netherlands, I knew things were about to __2__. I __3__ where to leave the cards: the train, benches at the station, libraries, mailboxes－the possibilities were __4____5__， I went to the shop to buy some candy bars, __6__ to leave them as anonymous (匿名的) gifts for people on the train.However, __7__ home was extremely __8__and I couldn't find a place to leave the gifts.An elderly man must have__9__me searching for a place to leave them, because he asked me if I was __10__ something. Right then I __11__that my first smile card would not be anonymous.With a big smile, I told him that I found what I was looking for, __12__ him the candy bar and a card.He had only just finished reading the __13__ when I arrived at my__14__and got off the train, but he was still smiling and__15__ his candy as I waved at him from the__16__. Despite having worked for a full day, I__17__ bounced (跳) home.Before I entered my__18__(n)__19__candy bar for a neighbor who was in a difficult financial situation, but worked hard every day to get the very best for his young son.I figured they both__20__a tasty little treat. 解题导语：作者在日子艰难的时候收到了别人寄来的微笑贺卡。他效仿这种做法给他人发微笑卡片和糖块传递爱的信念。根据下文语境可知此处指作者过去几周一直很艰难。tough“艰难的”。C | 
