instruction:
In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.
question:
All imaginary numbers are complex numbers with _ for the real part.
answer:
zero

question:
Geckos have _ eyelids .
answer:
no

question:
Toenails are similar, except that they grow _ times slower and are on the toes.
answer:
four