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]: Heart attacks occur most often around ____ in the morning.
[A]: five

[Q]: Numbers can be positive or ____ only.
[A]: zero

[Q]: Yew is a small genus of about ____ species scattered across North America, Europe, and Asia.
[A]:
eight