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.

[Q]: Deer mice have four toes on the forefeet and ____ toes on the hind feet.
[A]: five


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


[Q]: Gravity is the weakest of all ____ forces but unlike the others it has an unlimited range.
[A]:
four