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: Conversations overlap, especially when more than three people try to talk in ____ room.

A: one
****
Q: International mail consists of ____ categories of mail.

A: three
****
Q: Snow falls only every ____ or three years.

A:
two
****