A．Given by the local government．
B．Born by a large number of bitches．
C．Bought from different cities．
D．Captured over grassland．

A．ll-week course for control duty．
B．ll-week course for patrol duty．
C．9-week course for control duty．
D．9-week course for patrol duty．

A．Catching runaway criminals．
B．Scratching the hidden bombs．
C．Patrolling the dangerous town．
D．Drug-sniffing or bomb-sniffing．