The conference has been held to discuss the effects of tourism ______ the wildlife in the area.

1. A.
   in
2. B.
   on
3. C.
   at
4. D.
   with

The conference has been held to discuss the effects of tourism _______ the wildlife in the area.

in   B. on.   C. at  D. with

The conference has been held to discuss the effects of tourism ________the wildlife in the area.?

A.in                      B.on                            C.at                      D.with

The conference has been held to discuss the effects of tourism _______ the wildlife in the area.

The conference has been held to discuss the effects of tourism _______ the wildlife in the area.

A．on               B．in                C．at               D．of