1.While walking along the _______,he found footprints on the _______.

1.While walking along the _______,he found footprints on the _______.
A.sand;sand B.sands;sands C.sand;sands D.sands;sand
2._____he gave me
A.What a good advice B.How a good advice C.What good advice D.How good advice
3.There are many_____-shoes in this shop/
A.man's B.men's C.man's D.mens'