阅读短文,从 下列选项中选一项适合本文的选项。 What does “a piece of cake” mean? I knew little about English when I first came to America. So I went to a language school every day 1 English. One day during the break I asked one of my classmates a 2 . When I thanked 3 for it , she said “You are welcome. It’s a piece of cake. ” I thought to myself 4 is really a society for money. Everything is 5 for pay there. So I said to her “I haven’t 6 any piece of cake with me today. What about a piece of biscuit?” She looked at me in 7 , then smiled. She said “Ha ha you don’t 8 me. 9 I mean is “no problem”. 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 10 . I really know very little about English. I must work hard at English to improve it.