A driver pulled up beside a farmhouse.He gotout and knocked at the door.A very old woman an-swered the door,and he asked her for directions toDes Moines.“Don’t know,”the woman said.He gotback in his car and pulled away.Then he heard voic-es.He looked in his rearview mirror(后视镜)and sawthe woman and an equally old man waving for him to A driver pulled up beside a farmhouse. He gotout and knocked at the door. A very old woman an-swered the door, and he asked her for directions to Des Moines. “Do not know, ” the woman said.He gotback in his car and pulled away.Then he heard voic-es .He looked in his rearview mirror (and rearview mirror) and sawthe woman and an equally old man waving for him to