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]: ATMs are expensive machines with an average useful life of ____ to fifteen years.
[A]: ten


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


[Q]: Marshes are shallow wetlands less than ____ meters deep.
[A]:
two