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]: Most psychologists agree that the big ____ personality traits are stable across the life-span.
[A]: five


[Q]: Owls have ____ toes on each foot, like most birds.
[A]: four


[Q]: Pandas sleep two to ____ hours a day.
[A]:
four