Given a sentence, fill out the missing word with a 'no' or a number (between zero and ten). You should write the numbers with english alphabet, like: four instead of 4.

[EX Q]: Yellow fever begins suddenly after an incubation period of three to ____ days.
[EX A]: five

[EX Q]: Snowboard pants do have ____ times as many pockets as ski pants though.
[EX A]: five

[EX Q]: Earthworms have ____ means of regulating temperature or water loss.
[EX A]:
no