根据短文内容及首字母提示，填写所缺单词，是短文意思完整。每空限一词。
I’ll never forget my experience in America. I knew l       about English when I first came to America. So I went to a l      school to learn English every day except Sunday. One day, d  the break time, I asked Alice, one of my classmates, a question that I didn’t u     . When I thanked her for it, she said, “You are     w      , it is a piece of cake.” I said to m    , “America is really a country for m     because people do everything for pay.” So I said to her, “I haven’t taken any piece of cake with me today, what about something else?” She looked at me with a big s      on her face, saying, “What I mean is ‘no p      ’, and it is only a small matter.” From then on, I came to learn that “a piece of cake” is not only a piece of cake but also means a thing that is very e       to do. What an interesting thing, don’t you think so?