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

[EX Q]: Scorpions can live for _ to seven years.
[EX A]: three

[EX Q]: Diffusion occurs between the capillaries of the _ blood supplies.
[EX A]: two

[EX Q]: Most dinoflagellates are unicellular forms with _ flagella .
[EX A]:
two