________ an apple., This is, These are, ________ apples., This is, These are, _____ books., This is, These are, _____ a book., This is, These are, _____ trains., This is, These are, _____ a train., This is, These are, _____ keys., This is, These are, _____ key., This is, These are, ____ boxes., This is, These are, ____ box., This is, These are, ____ a chair., This is, These are, ____ chairs., This is, These are, ________ rulers., This is a, These are, ________ ruler., This is a, These are, ________ robots., This is, These are, ________ a robot., This is, These are, ________ mice., This is an, These are, ________ mouse., This is a, These are, ________ a fish., This is, These are, ________ fish.., This is, These are, ________ a sheep., This is, These are, ________ sheep., This is, These are, ________ a donkey., This is, These are, ________ donkeys., This is a, These are

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