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18. There are seven days in a week.
19. I have some books on the shelves.
20. There are 71 boys and girls in our class.
21. Where is the computer?
22. How many children on the playground?
19. I have some books on the shelves.
20. There are 71 boys and girls in our class.
21. Where is the computer?
22. How many children on the playground?
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