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]: Coastal kelp beds, for example, appear to be three times larger than in the past four or ____ years.
[A]: five


[Q]: Light drives the interconversion of ____ forms of phytochroms.
[A]: two


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