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: Milk is a good source of all ____ nutrients.

Answer: three


Question: Marine biologists have ____ theories on why whales breach.

Answer: two


Question: Insomnia can be short-lived, lasting only ____ to two nights.

Answer:
one