instruction:
In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.
question:
Cigarette smokers have up to a _ times higher incidence of bladder cancer than non-smokers.
answer:
four


question:
Rheas are brownish instead of black like the ostrich and have _ toes instead of two.
answer:
three


question:
Nymphs feed for _ to eight weeks before entering the adult stage.
answer:

five