TASK DEFINITION: In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.
PROBLEM: Some people have _ or four careers during their lives.

SOLUTION: three

PROBLEM: Monsoons coming every three to _ years can add almost a foot of water to the mountain's surface.

SOLUTION: seven

PROBLEM: Many authors believe that minerals have _ chakra, while animals have three or four.

SOLUTION:
one