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: Nightmares happen frequently in childhood, especially between the ages of ____ and six.\Question: Choose the right answer from options given a) three b) eight c) no d) ten

SOLUTION: a

PROBLEM: Some male fish return after just ____ years.\Question: Choose the right answer from options given a) no b) two c) one d) six

SOLUTION: b

PROBLEM: Eyes turn because of the function of ____ eye muscles.\Question: Choose the right answer from options given a) six b) five c) four d) two

SOLUTION:
a