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]: Neurofibromatosis appears in ____ forms.
[A]: two


[Q]: Systems information is ____ dimensional because it varies with time.
[A]: four


[Q]: Butterflies have ____ antennae with clubs at the end.
[A]:
two