Fill in: in (x2), with (x2), of, on. 1 He ate his soup . . . . . . . with. . . . . . . a spoon. 2 I can't decide . . . . . on. . . . . . . . what to cook. 3 Vegetables are rich . . in. . vitamins. 4 Can I have the fish . . with. . potatoes and cabbage, please? 5 He enjoys cooking, so he's going to participate . . . in. . . . . . . a competition. 6 A chicken sandwich consists . . . . of. . . . . . chicken between two slices of bread.