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]: Sexual reproduction involves the union of cells from ____ parents.
[EX A]: two

[EX Q]: Buses are ____ times as fuel efficient as cars.
[EX A]: five

[EX Q]: Many ticks can live as long as ____ to five months between each stage.
[EX A]:
three