In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.

[EX Q]: Reverse osmosis uses three to ten gallons of water to produce _ gallon of drinking water.
[EX A]: one

[EX Q]: Merlin is about five and _ half inches long.
[EX A]: one

[EX Q]: Special relativity shows that time behaves surprisingly like the _ spatial dimensions.
[EX A]:
three