instruction:
In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.
question:
Dwarf trees are diminutive and shrub-like, reaching _ feet or so at maturity.
answer:
four

question:
Smokers tend to become disabled and retire early _ times more than non-smokers.
answer:
six

question:
Shrubs are perennial plants-meaning they live for at least _ years.
answer:
three