I knew little about English when I first came to America．So I went to a language school every day to   1   English．One day，during the break，I asked one of my classmates a question．When I tanked her for it，she said，"   2  ．It's a piece of cake．"I thought to  3   ，"She wants a piece of cake? "So I said to her，"I haven't taken any piece of 4  with me today．What about a piece of biscuit（'饼干） ?"

She looked at me in surprise and then smiled．She knew that I didn't   5  her．She said，"What I mean is no problem．"Then I began to learn that" a piece of cake" is not only a piece of cake，but also means a thing that is very easy．

1．A．tell                  B．know             C．teach              D．learn

2．A．All right                                           B．The same to you 

C．You're welcome                                       D．Nothing serious

3．A．yourself              B．myself           C．himself            D．herself

4．A．bread               B．pizza              C．biscuit           D．cake

5．A．understand          B．remember        C．find               D．believe

用方框中所给词语的适当形式填空，使短文正确、通顺、连贯。（每词限用一次）

A piece of cake

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   that I didn't understand．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（社会）for money．Everything   5__   for pay there．So I said to her，“I   6   any piece of cake with me today．What about a piece of biscuit?”

She looked at me   7  ，then smiled．Then she realized that I   8   her．She said，“What I mean is ‘  9  ’．”Then I came to learn that “a piece of cake” is not only a piece of cake，  10   means a thing that is very easy．