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]: Pertussis is highly contagious with symptoms that can linger ____ to ten weeks.
[A]: six


[Q]: Photosynthesis has ____ main sets of reactions.
[A]: two


[Q]: Most nematodes molt ____ times.
[A]:
four