Strike out the odd words in the sentences

1. • There
   • is
   • are
   • a
   • bookcase
   • in
   • front
   • of
   • the
   • wall.
2. • How
   • many
   • people
   • are
   • there
   • under
   • in
   • the
   • kitchen?
3. • We
   • have
   • to
   • go
   • to
   • the
   • shop.
   • There
   • is
   • are
   • no
   • food
   • left.
4. • Are
   • there
   • any
   • students
   • in
   • on
   • front
   • of
   • the
   • classroom?
5. • There
   • isn't
   • aren't
   • any
   • chairs
   • in
   • this
   • room.
6. • The
   • boy
   • is
   • hiding
   • in
   • behind
   • his
   • father.