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

[Q]: Southern moles are six to _ inches long and weigh three to four ounces.
[A]: seven


[Q]: Dwarf trees are diminutive and shrub-like, reaching _ feet or so at maturity.
[A]: four


[Q]: Temperatures occasionally fall below _ but only last a very short time.
[A]:
zero