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: Food waste is transformed into soil-like humus in ____ to seven days.\Question: Choose the right answer from options given a) ten b) five c) zero d) three

SOLUTION: d

PROBLEM: Bytes are sets of ____ bits.\Question: Choose the right answer from options given a) four b) eight c) five d) ten

SOLUTION: b

PROBLEM: Comets really have ____ visible tails.\Question: Choose the right answer from options given a) two b) eight c) one d) five

SOLUTION:
a