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: Differentiation is caused by the energy going in ____ directions.

SOLUTION: two

PROBLEM: Some airports have ____ parallel runways.

SOLUTION: two

PROBLEM: Infection can cause a range of illnesses, from ____ symptoms to fatal disease.

SOLUTION:
no