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]: Blood donors can give blood every ____ weeks, or six times a year.
[A]: eight


[Q]: Plants generally live ____ years but sometimes longer.
[A]: two


[Q]: Abortion is also common, with ____ in five pregnancies ending in abortion.
[A]:
one