请用适当的词完成下面的短文，并把所缺单词填写在指定的位置上。每个空只能填写一个形式正确、意义相符的单词。

    Mary works in a bank. She is busy every day that she no time to make dinner. There is a(n) near Mary's house. After Mary comes back home from work, she likes to go to the restaurant dinner.

    One day, Mary was in the restaurant, she saw old man next to her looking for (寻找) something on the floor (地板). Mary felt surprised. So she the old man, are you looking for?"

    "Oh, a piece (块) of bread," the man answered.

    "A piece of bread? Oh, the floor is so . Please take this piece. "Mary gave (给) a big piece of bread to the old man.

    "But my teeth in that piece of bread."