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 infected persons have ____ symptoms of disease.\Question: Choose the right answer from options given a) six b) no c) three d) one

SOLUTION: b

PROBLEM: Sound waves travel through the air in a similar manner, but in all ____ dimensions.\Question: Choose the right answer from options given a) three b) five c) nine d) one

SOLUTION: a

PROBLEM: Heart attacks are ____ times more likely to be fatal for a person who is depressed.\Question: Choose the right answer from options given a) nine b) five c) eight d) seven

SOLUTION:
b