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: Young emus are very vulnerable to disease until they are about ____ months old.\Question: Choose the right answer from options given a) no b) ten c) six d) three

SOLUTION: d

PROBLEM: Vaccinated newborns have protection for at least ____ years.\Question: Choose the right answer from options given a) four b) five c) two d) no

SOLUTION: b

PROBLEM: Most infections produce ____ symptoms in people.\Question: Choose the right answer from options given a) ten b) no c) zero d) eight

SOLUTION:
b