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: Real airplanes have round engines and ____ wings.\Question: Choose the right answer from options given a) four b) six c) three d) two

SOLUTION: d

PROBLEM: Redwoods reproduce ____ ways.\Question: Choose the right answer from options given a) zero b) two c) six d) nine

SOLUTION: b

PROBLEM: Stabilizers have ____ fluids to leak.\Question: Choose the right answer from options given a) no b) ten c) eight d) three

SOLUTION:
a