TASK DEFINITION: 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.
PROBLEM: Urine tests are really limited in that they only look for five to ____ substances.

SOLUTION: nine

PROBLEM: Hearing is acute by three or ____ weeks and kittens learn to determine what sounds mean.

SOLUTION: four

PROBLEM: Microscopes have ____ general purposes.

SOLUTION:
two