Look, he is standing _______ the edge of the Canyon.

      A. on    B. at    C. in   D. of

Jim was hurt because he tripped and fell over the edge ndline.(就划线部分提问)

　　________ ________　Jim hurt?

Jim was hurt because he tripped and fell over the edge.（就划线部分提问）

I was _____ the Grand Canyon, one of the wonders of the natural world.

1. A.
   at the edge of
2. B.
   on the edge of
3. C.
   in the edge of
4. D.
   on the edge from