Mr Smith telephoned the doctor in the middle of the night.

"Come quickly, Doctor, You know that my wife sleeps with her mouth open. Well , a mouse has run inside her!"

"I will be with you in about ten minutes," replied the doctor. "Until I arrive, try holding a piece of cheese in front of her mouth. This may bring the mouse out."

When the doctor arrived, Mr Smith was not holding a piece of cheese. He was holding a fish in front of his wife's mouth.

"What are you doing", asked the doctor. "A mouse doesn't like a fish."

"I know," said Mr Smith, "But we have to get a cat at first." 

史密斯先生在半夜里给医生打电话。

“医生，快来啊！你知道我妻子习惯张着嘴睡觉，结果一只老鼠钻进去了。”

“我十分钟后到，”医生回答，“在我到达之前，试着在她嘴面前拿一片干奶酪，也许会把老鼠引出来。”

当医生到达时，史密斯先生不是拿一片干奶酪，而是在妻子嘴前拿着一条鱼。

“你这是干什么呀？”医生说道，“老鼠不喜欢吃鱼。”

“这我知道，”史密斯先生说，“可我得先把猫引出来。”