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]: Exposure can occur in ____ general ways, ingestion, skin contact and inhalation.
[A]: three


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


[Q]: Lobsters use their ____ pairs of antennas as sensors.
[A]:
three