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: Perennial grass takes three to ____ years before it is mature enough to produce adequate seed.\Question: Choose the right answer from options given a) five b) seven c) six d) four

SOLUTION: a

PROBLEM: Respiratory therapists complete two to ____ years of education.\Question: Choose the right answer from options given a) no b) one c) four d) eight

SOLUTION: c

PROBLEM: Hippos have ____ toes.\Question: Choose the right answer from options given a) four b) zero c) six d) eight

SOLUTION:
a