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]: Irrigation can increase land productivity by three to ____ times, especially in the north.
[EX A]: seven

[EX Q]: Cleavage is good in ____ directions at right angles.
[EX A]: two

[EX Q]: Primary vaccination consists of ____ intramuscular doses of vaccine.
[EX A]:
three