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]: Many addicts use opium because they have ____ access to public health care facilities.
[A]: no


[Q]: Spiders have eight legs and usually have ____ eyes.
[A]: eight


[Q]: Upper canines are long and well-developed, and the molars have ____ or four cusps.
[A]:
three