_____ the year 2008 draws near, the construction of Olympic sites is catching the attention of the public.

1. A.
   So long as
2. B.
   As
3. C.
   Once
4. D.
   Whether

______the year 2008 draws near, the construction of Olympic sites is catching the attention of the public.

　 A. So long as　　 B. As　　　 C. Once　　　 D. Whether

_____ the year 2008 draws near, the construction of Olympic sites is catching the attention of the public.

[　　]

A．So long as　　　B．As

C．Once　　　　　D．Whether