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: Hearing is acute by three or ____ weeks and kittens learn to determine what sounds mean.

A: four
****
Q: Biennials require portions of ____ growing seasons to reproduce.

A: two
****
Q: Lung disease is America's number three killer, responsible for one in ____ deaths.

A:
seven
****