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: Banks hold ____ excess reserves and the public holds no currency.

A: no
****
Q: Western medicine uses ____ approaches, drugs or surgery.

A: two
****
Q: Oxygen exists in all ____ allotropic forms.

A:
three
****