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: Owls have ____ toes on each foot, like most birds.\Question: Choose the right answer from options given a) no b) seven c) four d) one

SOLUTION: c

PROBLEM: Elephants have four molars, which are replaced ____ times, for a total of six sets in a lifetime.\Question: Choose the right answer from options given a) five b) no c) three d) one

SOLUTION: a

PROBLEM: Beetles live for between one and ____ months.\Question: Choose the right answer from options given a) two b) three c) ten d) no

SOLUTION:
b