问题：
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.
| A．referred to; for | B．referred; as |
| C．referred to; as | D．referred; for |
参考答案：