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: Most internal parasites are specific to one or ____ species.\Question: Choose the right answer from options given a) seven b) three c) two d) five

SOLUTION: c

PROBLEM: Casinos have no windows and they have ____ clocks.\Question: Choose the right answer from options given a) six b) four c) eight d) no

SOLUTION: d

PROBLEM: Beavers are from ____ to seven years old, usually in kindergarten, grade one, or grade two.\Question: Choose the right answer from options given a) nine b) zero c) five d) six

SOLUTION:
c