Lucy or Lily is doing________homework in the classroom.A.her B.their

题目

Lucy or Lily is doing________homework in the classroom.A.her B.their
Lucy nor Tom is doing________homework in the classroom.A.his B.their
Either Lucy nor I am not doing________homework in the classroom now .A.my B.our
有的说根据就近一致原则应该都选A,有的说根据意思应都选B.各位大师怎么看?（求详解）

答案