【单选题】

Humans not only love eating ice cream, they enjoy (21) it to their pets. Market studies show that two thirds of all dog owners give ice cream to the dogs. (22) , says William Tyznik, an expert in animal nutrition at Ohio State University, "ice cream is not good for dogs. It has milk sugar in it, " he says, "which dogs cannot (23) very well. "

(24) by that knowledge but aware of the desire of dog owners to (25) their companions, Tyznik invented a new frozen treat for dogs that, he says, is more nutritious than ice cream-and as much (26) to eat. The product, called Frosty Paws, is made of a liquid by-product of cheese and milk with the sugar (27) Frosty Paws also contains refined soy flour, water, vegetable oil, vitamins and minerals. It (28) Tyznik, who has also invented a horse feed (called Tizwhiz) and (29) dog focd (named Tizbits) , three years to (30) the Frosty Paws formulas, and two (31) to commercialize it.After losing $25,000 trying to market the invention himself, Tyznik sold the rights to associated leeCream of Westerville, Ohio, which makes the product and (32) it in cups.
Tyznik claims that Frosty Paws has been tested (33) and that "dogs love it". Of 1,400 dogs that have been (34) the product, he says, 89 percent took it on the first (35) Three out of four (36) it to Milk-Bone or sausages. The product, which will be (37) in the ice-cream section of supermarkets, comes in (38) of three or four cups, costing about $1.79.
What would happen (39) a human should mistake Frosty Paws for real ice cream "Nothing, " says Tyznik. "It’s (40) , but frankly, it won’t taste very gooD、\
A、providedB、when C、though D、if