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.

Most health professionals recommend approximately ____ hours of sleep each night.
eight

Endospores exhibit ____ signs of life, being described as cryptobiotic.
no

Essential oils have a non-toxic, residual effect of up to five months from just ____ application.

one