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]: Arthritis is characterised by ____ major observable changes in the joints.
[EX A]: four

[EX Q]: Fossil fuels come in ____ major forms coal, oil and natural gas.
[EX A]: three

[EX Q]: Bullfrogs can live up to ____ years .
[EX A]:
four