It is ________ great honor to be invited here to give ________ speech on how to give first aid to the injured．

1. A.
   a, a
2. B.
   a, the
3. C.
   the, the
4. D.
   the, a

It is _______great honor to be invited here to give ________speech on how to give first aid to the injured.

A. a, a                     B. a, the               C. the, the                D. the, a