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: 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: Cyclic neutropenia tends to occur every three weeks and last ____ to six days at a time.\Question: Choose the right answer from options given a) six b) four c) five d) three

SOLUTION: d

PROBLEM: Most aphthous ulcers heal in ____ to two weeks.\Question: Choose the right answer from options given a) two b) six c) one d) three

SOLUTION:
c