TASK DEFINITION: In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.
PROBLEM: Lightning can travel _ miles or more horizontally from the storm, then strike the ground.

SOLUTION: six

PROBLEM: Porcine insulin has _ different amino acid and bovine insulin has three different amino acids.

SOLUTION: one

PROBLEM: Rheumatic fever begins _ to six weeks after an untreated streptococcal infection.

SOLUTION:
one