instruction:
In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.
question:
Lightning can travel _ miles or more horizontally from the storm, then strike the ground.
answer:
six


question:
Birds begin dying of fowl cholera _ to nine days after exposed to the virus.
answer:
four


question:
Koalas have _ baby about every two ears.
answer:

one