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

[Q]: Most insects have _ wings, but dipterans have only two.
[A]: four


[Q]: Most orangutans are _ to five feet long, some can reach a length of six feet.
[A]: four


[Q]: Many angiosperms have more than _ sets of chromosomes.
[A]:
two