My family enjoy eating ...........vegetables

My family enjoy eating ...........vegetables.
A. a
B. an
C. the
D. x
Harry is ______ teacher.
A. a
B. an
C. the
D. x
She works six days _____ week.
A. in
B. for
C. a
D. X

I bought ______ umbrella to go out in the rain.
A. a
B. an
C. the
D. x