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 orthoptists work ____ hours a day, four or five days a week.

A: eight
****
Q: Copper has ____ naturally occurring isotopes.

A: two
****
Q: Bidding is a game that is played in ____ parts.

A:
two
****