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.

[EX Q]: Some rusts produce up to ____ different spore forms.
[EX A]: five

[EX Q]: Water consists of ____ hydrogen and one oxygen atom.
[EX A]: two

[EX Q]: Kieffer pears require ____ to three weeks to ripen.
[EX A]:
two