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: 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: Centrifugal pumps can usually handle up to about ____ percent by volume of air.\Question: Choose the right answer from options given a) one b) five c) eight d) seven

SOLUTION: b

PROBLEM: Giant squid have ____ gas spaces in their bodies.\Question: Choose the right answer from options given a) three b) no c) eight d) nine

SOLUTION:
b