From the top of the building, you can see at least ________ distance of 100 kilometers on ________ clear day．

1. A.
   a ;the
2. B.
   / ;a
3. C.
   the ;a
4. D.
   a;a

From the top of the building, you can see at least ______ distance of 100 kilometers on ______ clear day.

A. a; the　　　 B. /; a　　　 C. the; a　　 D. a; a

From the top of the building, you can see at least ______ distance of 100 kilometers on ______ clear day.

A. a; the　　　 　 B. /; a　　　 　 C. the; a　　 D. a; a

From the top of the building,you can see at least_______distance of 100 kilometers on_____clear day.

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