题目内容：

综合填空: 根据短文内容选择方框内的单词,并用其正确的形式填入空白处(每空填一词)，使后的短文意思通顺，语法正确，结构完整。

sadly, feel, surprised, piece, since

Last week, I went to the park with a lot of food. It was a fine day, so I __1._____very pleased. When I got to the gate, an old man was waving to me. I stopped and asked, “Can I help you?” “I lost my purse,” said the old man ___2._____ , “I’m very hungry now. Can you give me something to eat?” “Certainly!” I took out two ___3.______of bread at once. The old man received the bread, but he was still standing with a red face. “Why? You haven’t had enough?” I asked. He said slowly, “Yes, I have. But my brother has not eaten anything  4.____ yesterday morning.” He said and pointed to the ground. I was      5._____to see his brother. He was a MONKEY!