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]: Fuzzy logic is an attempt to combine the ____ techniques.
[EX A]: two

[EX Q]: Lung disease is America's number ____ killer, responsible for one in seven deaths.
[EX A]: three

[EX Q]: Several embryos are transferred into the uterus after three to ____ days.
[EX A]:
five