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


[Q]: Water emits oscillations that are measurable from ____ through Megahertz.
[A]: zero


[Q]: Ear buds have ____ cuffs that surround the ear, and no headband.
[A]:
no