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]: Some botanists recognise ____ botanical varieties.
[A]: two


[Q]: Most insects have two antennae, six legs, and ____ wings.
[A]: four


[Q]: Larger pearls can take up to ____ years to develop.
[A]:
four


