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: Human malaria is caused by ____ species of Plasmodium . .

A: four
****
Q: Respiratory therapists complete two to ____ years of education.

A: four
****
Q: Cats have ____ toes in the forepaws and four in the hind paws.

A:
five
****