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: Most insects have two antennae, six legs, and ____ wings.

A: four
****
Q: Ligand seeks ____ receptors into binding and mutual phosporylation.

A: two
****
Q: Powder coat is recyclable and contains ____ hazardous air pollutants.

A:
no
****