Only in recent years ______ to realize the importance of wildlife conservation.

         A. do people begin                                                 B. have people begun

         C. people have begun                                            D. people begin

Only in recent years ______ to realize the importance of wildlife conservation.

       A. do people begin                                    B. have people begun

       C. people have begun                                 D. people begin

Only in recent years ______ to realize the importance of wildlife conservation.

1. A.
   do people begin
2. B.
   have people begun
3. C.
   people have begun
4. D.
   people begin

Only in recent years ______ to realize the importance of wildlife conservation.