In an hour, we can travel to places _______ would have taken our ancestors days to reach．（2006上海卷）

In an hour, we can travel to places _______ would have taken our ancestors days to reach.

　 A. where　　 　　　　　　　 B. when

C. which　　 　　　　　　　 D. what

In an hour,we can travel to places ________ would have taken our ancestors days to reach．

1. A.
   where
2. B.
   when
3. C.
   which
4. D.
   what

In an hour, we can travel to places _______ would have taken our ancestors days to reach．（2006上海卷）

     A．where          B．when C．which          D．what