TASK DEFINITION: In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.
PROBLEM: Most people stay three or four years, sometimes _ or six years.

SOLUTION: five

PROBLEM: Flexible shapes are also shapes which have _ obvious way of being attacked.

SOLUTION: no

PROBLEM: Junks have from _ to three masts or sails.

SOLUTION:
two