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

[EX Q]: Some women describe their symptoms as feeling about _ months pregnant.
[EX A]: four

[EX Q]: Violets usually have _ sepals at the base and have five petals.
[EX A]: five

[EX Q]: Gibberellins are diterpenoids derived from _ isoprenoid units forming a system of four rings.
[EX A]:
four