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: Selenium is ____ times more poisonous than arsenic.\Question: Choose the right answer from options given a) one b) five c) eight d) two

SOLUTION: b

PROBLEM: Hurricanes weaken rapidly when passing over land surfaces for ____ reasons.\Question: Choose the right answer from options given a) two b) three c) nine d) zero

SOLUTION: b

PROBLEM: Research chemists create ____ dimensional models of molecules in shared workspace.\Question: Choose the right answer from options given a) nine b) ten c) three d) four

SOLUTION:
c