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: Batteries consist of ____ electrodes immersed in an electrolyte.\Question: Choose the right answer from options given a) two b) eight c) three d) seven

SOLUTION: a

PROBLEM: Perennial grass takes ____ to five years before it is mature enough to produce adequate seed.\Question: Choose the right answer from options given a) six b) zero c) three d) no

SOLUTION: c

PROBLEM: Solvents are of ____ kinds, polar and non-polar .\Question: Choose the right answer from options given a) one b) six c) two d) eight

SOLUTION:
c