1) A. -s
B. Singer – singers, cat – cats
2) A. -es
B. Box – boxes, wish – wishes, witch – witches
3) A. -es, -s
B. Video – videos
4) A. -ies
B. Bunny – bunnies, berry – berries, candy – candies, lobby – lobbies
5) A. -s
B. Way – ways
6) A. -ves
B. Leaf – leaves