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: Widowed men are ____ times as likely to be murdered.\Question: Choose the right answer from options given a) two b) four c) three d) no

SOLUTION: b

PROBLEM: Astronomical observations suggest ____ or close to zero space-time curvature.\Question: Choose the right answer from options given a) six b) zero c) ten d) seven

SOLUTION: b

PROBLEM: Maximum age is ____ years, but most live for four years.\Question: Choose the right answer from options given a) no b) nine c) seven d) six

SOLUTION:
c