John is standing behind Mary,and Mary is standing behind John.How is this possible?

John is standing behind Mary,and Mary is standing behind John.How is this possible? John is standing behind Mary,and Mary is standing behind John.How is this possible? 5.Who is the man standing over there?--- .A.A.This is John Smith B.B.John Smith is standing over there C.C.John Smith,the new manager D.D.Over there is John Smith standing 7.Don't lose heart!You should ____your courage and overcome the difficulty.A.A John is standing ________ Gina and Jim.A.at B.during C.between D.in选什么，为什么？ Nothing is standing in my standing standing john is()than peter whom is john talking John is a ( ) boy. Look at Tom!He_on the table.A stand B standing C are standing B is standing the boy is standing behindthe door our teacher is standing ( a___ ) student our English teacher is standing ( ) her ( ) me 画线部分提问He is standing _at__the__bus__station____ He is standing on the chair是什么意思 A teacher is standing ---- the new car. look,the teacher is standing __the blankboard