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: Birds reach sexual maturity in three to ____ years.\Question: Choose the right answer from options given a) seven b) two c) five d) six

SOLUTION: c

PROBLEM: Most people require roughly seven to ____ hours of sleep a night to stay alert through the day.\Question: Choose the right answer from options given a) eight b) ten c) one d) five

SOLUTION: a

PROBLEM: Most people spend four to ____ years going to school acquiring skills so they can work.\Question: Choose the right answer from options given a) eight b) three c) five d) one

SOLUTION:
a