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 endocrinologists see patients every ____ months throughout the pregnancy.\Question: Choose the right answer from options given a) six b) two c) zero d) three

SOLUTION: b

PROBLEM: Antibodies contain ____ pairs of protein chains.\Question: Choose the right answer from options given a) no b) two c) nine d) zero

SOLUTION: b

PROBLEM: Sharks have a total of six senses, ____ of which are involved in locating food.\Question: Choose the right answer from options given a) five b) ten c) nine d) two

SOLUTION:
a