instruction:
In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.
question:
Essential oils have a non-toxic, residual effect of up to five months from just _ application.
answer:
one


question:
Bacteria acquire genes conferring resistance in any of _ ways.
answer:
three


question:
Saddle sores are a common problem after spending _ and seven hours in the sweat and heat.
answer:

six