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: Takins can even balance on their hind hooves to nibble on vegetation ____ feet above ground.\Question: Choose the right answer from options given a) two b) no c) nine d) eight

SOLUTION: d

PROBLEM: Mammals have only ____ sets of teeth.\Question: Choose the right answer from options given a) six b) five c) seven d) two

SOLUTION: d

PROBLEM: Cancer is the end result of approximately ____ contributing mutations in the tumor cell.\Question: Choose the right answer from options given a) six b) one c) three d) eight

SOLUTION:
d