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: Parliaments can last five years, often last ____ and a bit.\Question: Choose the right answer from options given a) four b) three c) five d) two

SOLUTION: a

PROBLEM: Ocular dryness responds to the use of artificial tears applied every ____ to three hours.\Question: Choose the right answer from options given a) no b) one c) three d) eight

SOLUTION: b

PROBLEM: Forests exclusively harbour just ____ genera.\Question: Choose the right answer from options given a) eight b) six c) three d) four

SOLUTION:
c