11.   We are constantly bitten by mosquitoes which are immune to the smoke from the several mosquito coils in the house.

12.   The teacher in charge of the class was found responsible because she was the one who lit the mosquito coils before getting off work.

13.   The firm is primarily involved in the manufacturing and sale of mosquito coils and other household insecticide products.

14.   The mosquito coils were placed between the cots in the dormitory, according to earlier media reports.