1) ________ an apple. a) This is b) These are 2) _____ books. a) This is b) These are 3) _____ trains. a) This is b) These are 4) _____ black horse. a) This is a b) These are 5) _____ keys. a) This is b) These are 6) ____ boxes. a) This is b) These are 7) _____ yellow door. a) This is a b) These are 8) ____ chair. a) This is a b) These are 9) _______ eraser. a) This is an b) These are 10) _______ board. a) These are b) This is a 11) ________ rulers. a) This is a b) These are 12) ________ robots. a) This is a b) These are  13) ________ kites. a) These are b) This is a 14) ________ alien. a) This is an b) These are

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