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Q11. He spends hours _______ the phone everyday.
Q12. He works ________ an insurance company.
Q13. What are you worrying ________?
Q14. He preferred classical music _________ popular numbers.
Q15. Ram made the most ________ his resources.
Q16. She was blind ________ the left eye.
Q17. This is my application _________ leave.
Q18. Sir, I could not attend work ________ Monday.
Q19. He sat ___ the table and started eating.
Q20. He is sure to work _________ the mob.
Use the suitable preposition to convey the meaning "excite the mob".