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3) Are those apples?

   Yes, they are. They're apples.

4) Are these bicycles?

   Yes, they are. They're bicycles.

5) Are these watches?

   No, they aren't. They're pens.

6) Are those snakes?

   Yes, they are. They're snakes.

7) Is this a lemon?

    No, it isn't. It's an orange.

8) Are these lemons?

   Yes, they are. They're lemons.

9) Are those tomatoes?

  No, they aren't. They're onions.

10) Are these records?

  No, they aren't. They're books.