Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to repel insects with beer [title] Kill fruit flies with an open beer can. [step] Fruit flies (also called vinegar flies) are attracted to fermented beverages like beer and wine. For an effective fruit fly trap, leave an open beer can sitting out with a small piece of paper taped over the lid.

Ending1: You should also put a length of aluminum foil over the top of the can to catch the flies. [substeps] The foil should cover the can tightly, which means the flies won't be able to get out. Ending2: This will draw insects to the open beer can and allow them to find the beer. [substeps] Studies have demonstrated that drinking an unopened beer can 23 times in a one month period can attract wasps to the beer. Ending3: Poke a small hole in the paper to allow the flies to enter the can. They will be unable to find their way out and will eventually drown in the beer. Ending4: Pour vinegar into the can to attract flies, then spin it around with a long piece of string. All you need to do is drop it over the trap and leave it there.

Answer format: ending1/ending2/ending3/ending4