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: Cyclic neutropenia tends to occur every three weeks and last ____ to six days at a time.\Question: Choose the right answer from options given a) six b) four c) five d) three

SOLUTION: d

PROBLEM: Brachiopods are superficially similar to bivalves, both having ____ shells.\Question: Choose the right answer from options given a) two b) eight c) seven d) one

SOLUTION: a

PROBLEM: Caprifigs usually bear ____ crops a year named profichi, mamme and mammoni .\Question: Choose the right answer from options given a) ten b) six c) eight d) three

SOLUTION:
d