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]: Hearing is acute by three or ____ weeks and kittens learn to determine what sounds mean.
[A]: four


[Q]: Titanium is found in column ____ along with chemically similar zirconium, hafnium, and thorium.
[A]: four


[Q]: Temperature drops throughout the night because of ____ processes.
[A]:
two