this or these? this = singular, these = plural

blank.gif apples-t.png apples
blank.gif burger-t.png cheeseburger
blank.gif cupcake-t.png muffin
blank.gif french-fries-t.png chips
blank.gif strawberries-t.png strawberries
blank.gif salad-t.png salad
blank.gif pizza-t.png pizza
blank.gif ice-cream-t.png ice-cream-t.png ice-creams
blank.gif popcorn-t.png popcorn
blank.gif hot-dog-t.png hot dog
blank.gif green-pepper-t.png green-pepper-t.png peppers
blank.gif tomato-t.png tomato-t.png tomatoes
blank.gif cheese-t.png cheese