Something caught my eyes when I was walking down the street．Two silver coins were shining in a melting（融化的）snow bank（积雪），so I dug through the snow to look for more．Of course，I just ended up with two cold hands．I slipped the two coins into my pocket and went home，colder but richer．I began to think about how to spend the money．

Two days later，Mary and her little sister Susy were searching the snow banks．"Finders are keepers" was my first thought． I didn't want to hand them out even though Susy was already crying．"I dropped them right here，"she said with tears． Her hands were cold and red for digging in the snow．"Maybe they slid down（滑下）the street with the melting snow． Let's dig over here．"Mary's voice sounded confident．

"They'll never know" was my second thought，and I walked past them．"Peter，have you seen two silver coins？"asked Mary． Susy looked up from digging． Her eyes were hopeful．

"Tell a lie" was my third thought．"As a matter of fact，"I hesitated（犹豫），"I dug two coins out of that snow bank just a few days ago． I wondered who might have lost them．"Susy hugged me with a big smile，"Oh，thank you，thank you．"

（1）Why did the writer dig through the snow？ 　 　

（2）When did Mary and Susy search the snow banks？ 　 　

（3）Who was confident of finding out the silver coins，Mary or Susy？ 　 　

（4）How did Susy feel when she saw the writer？ 　 　

（5）What might the writer do with the two coins in the end？