Mary:Hi _1_ ,Lucy!Excuse me!
Lucy:_What2_
Mary:Who's that man?
Lucy:_3Which man_ _4_?
Mary:The man _5_in the white coat.
Lucy:Oh,that's my father.
Mary:_Is6_ your father a teacher?
Lucy:Yes,you are_7_ right.
Mary:Is that black bike his?
Lucy:No _8_.His bike is blue.
Mary:Oh,our teacher is coming.let's_ go to the classroom.
Lucy:Ok_10_.