A piece of cake
I knew little about English when I first came to America.So I went to a language school every day to learn English.One day,during the break,I asked one of my classmates a question that I didn'tunderstand.When I thanked her for it,she said,"You are welcome .It's a piece of cake."I thout to myself:America is really a society for money.Everything_is done_____for pay there .So I said to her,"I_didn't bring 或_haven't taken___any piece of cake with me today.What about a piece of biscuit?"
is done 是做什么都是为了钱 的意思
haven't taken 给外国人的印象是 还没有吃 的意思,如 I haven't taken my breakfast= 我还没有吃过（用过）早餐 应该说 didn't bring 是 没有带来的意思,不可不知