instruction:
In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.
question:
Unipolar motors have _ coils and are likely to have five or six wires attached.
answer:
four


question:
Some bird feeders have _ perches at all, but neither do tree trunks.
answer:
no


question:
Some people have _ symptoms and never even feel sick.
answer:

no