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: Chlorine has ____ naturally occurring isotopes.\Question: Choose the right answer from options given a) nine b) eight c) three d) two

SOLUTION: d

PROBLEM: Alcoholics are nearly ____ times more likely than others to die in motor vehicle crashes.\Question: Choose the right answer from options given a) ten b) eight c) six d) five

SOLUTION: d

PROBLEM: Algae come in ____ forms, unicellular, multicellular and colonial.\Question: Choose the right answer from options given a) ten b) three c) seven d) five

SOLUTION:
b