instruction:
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.
question:
Some animals have only ____ or three chambers .
answer:
two


question:
Wolves have ____ different types of fur.
answer:
two


question:
Pertussis is highly contagious with symptoms that can linger ____ to ten weeks.
answer:

six