TASK DEFINITION: Given a sentence with a missing word, pick the answer option that best fills out the missing word in the sentence. Indicate each answer with its index ('a', 'b', 'c', 'd').
PROBLEM: Wolverines reproduce every ____ or three years.\Question: Choose the right answer from options given a) two b) three c) one d) four

SOLUTION: a

PROBLEM: Twin souls are the last ____ souls to individualize.\Question: Choose the right answer from options given a) two b) ten c) zero d) six

SOLUTION: a

PROBLEM: Arabian oryx are the smallest oryx, measuring ____ feet high at the shoulder.\Question: Choose the right answer from options given a) eight b) two c) four d) seven

SOLUTION:
c