There are two (f-------) in the classroom building.Mary's brother has a dog .( )ofteh helps  (  ) walk the dog .填人称代词

问题描述:

There are two (f-------) in the classroom building.
Mary's brother has a dog .( )ofteh helps  (  ) walk the dog .填人称代词

Mary's brother has a dog .( She )ofteh helps  (him ) walk the dog .