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]: International trade is a ____ way street.
[A]: two


[Q]: Neuroblasts delaminate in five waves spanning approximately ____ hours.
[A]: three


[Q]: Worms can have up to ____ hearts.
[A]:
ten