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: Fluorescent lamps are roughly ____ times more intense than ordinary lightbulbs.\Question: Choose the right answer from options given a) six b) one c) three d) eight

SOLUTION: c

PROBLEM: Living cells have at least ____ parts.\Question: Choose the right answer from options given a) seven b) three c) zero d) four

SOLUTION: b

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

SOLUTION:
d