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]: Cardiovascular disease is the cause of more deaths than the next ____ causes of death combined.
[A]: seven


[Q]: Statistics show that one out of every ____ people has a mental illness.
[A]: four


[Q]: All blood vessels have ____ layers called tunics .
[A]:
three