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 gerbils live three to ____ years and have few health problems.\Question: Choose the right answer from options given a) three b) four c) seven d) zero

SOLUTION: b

PROBLEM: Mosquitoes spend one to ____ days in the pupae stage.\Question: Choose the right answer from options given a) zero b) two c) five d) three

SOLUTION: b

PROBLEM: Most polar bears sleep for ____ to eight hours at a stretch and they take naps, too.\Question: Choose the right answer from options given a) eight b) seven c) ten d) zero

SOLUTION:
b