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.

[EX Q]: Body temperature attains ambient levels within four to ____ hours.
[EX A]: six

[EX Q]: Green energy comes in ____ basic forms.
[EX A]: two

[EX Q]: Aluminum accounts for about ____ quarters of the materials used in making aircraft.
[EX A]:
three