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

[EX Q]: Water is able to diffuse freely between the _ cells.
[EX A]: two

[EX Q]: Figure skating is like flying, but it's also like climbing hundreds of stairs in _ minutes.
[EX A]: four

[EX Q]: Hops generally come in _ forms, whole and pellets.
[EX A]:
two