The professor________ the perfect return of Shenzhou 7 in 2008______ “the most exciting thing in history” in his speech.

The professor________ the perfect return of Shenzhou 7 in 2008______ “the most exciting thing in history” in his speech.

1. A.
   referred to; for
2. B.
   referred; as
3. C.
   referred to; as
4. D.
   referred; for

The professor________ the perfect return of Shenzhou 7 in 2008______ “the most exciting thing in history” in his speech.

     A. referred to; for            B. referred; as 

C. referred to; as             D. referred; for

The professor________ the perfect return of Shenzhou 7 in 2008______ “the most exciting thing in history” in his speech.