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]: Many biologists believe the sandhill has been virtually unchanged for ____ million years.
[A]: nine


[Q]: Corporate mergers occur when ____ companies combine.
[A]: two


[Q]: Queens live an average of on to ____ years.
[A]:
three