I. Choose the best answer by underline the word 11. Every one of the cakes is/are gone. 12. Fifty percent of the pie have/has disappeared. 13. Fifty percent of the pies have/has disappeared. 14. One-third of the city is/are unemployed. 15. One-third of the people is/are unemployed. 16. All of the pie is/are gone. 17. All of the pies is/are gone. 18. Some of the pie is/are missing. 19. Some of the pies is/are missing. 20. None of the garbage was/were picked up.

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