招贤纳士
This is _____ apple. It is not _____ pear.
[     ]
A、a, a
B、an,a 
C、a, an
This is ______ key and that is ______ eraser.
[     ]
A、a, a
B、a, an
C、an, a
D、the, an
That's _____ English book. _____ my book. [     ]
A、a; It's
B、an; It's
C、a; Its
D、an; Its
There is _____ old map _____ China. [     ]
A、an; a
B、an; of
C、a; for
D、an; the
This is _____ ruler. _____ ruler is yellow. [      ]
A、the; a
B、a; a
C、A; the
D、a; The
—Is it _____ English book?
—No, it is _____ Chinese one. [     ]
A、a, a
B、an, a
C、an, an
—Is that an _____?
—Yes, it is. [     ]
A、notebook
B、baseball
C、eraser
I have _____ e-dog. _____ name is Hobo. [     ]
A、a, Its
B、an, Its
C、an, It's
D、an, it's
Is there _____ art room in your school library? [     ]
A、a
B、an
C、the
D、不填
Li Ming is _____ English teacher. Zhang Jun isn't _____ teacher. [     ]
A、an, a
B、a, an
C、an, an