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: Cows breed at ____ years, bulls at four.\Question: Choose the right answer from options given a) two b) three c) seven d) one

SOLUTION: b

PROBLEM: Most bioluminescence is blue for ____ reasons.\Question: Choose the right answer from options given a) seven b) two c) four d) zero

SOLUTION: b

PROBLEM: Space simply has ____ dimensions which are filled with material things.\Question: Choose the right answer from options given a) eight b) ten c) one d) three

SOLUTION:
d