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: Right whales are slow swimmers, averaging just ____ miles per hour.\Question: Choose the right answer from options given a) nine b) six c) two d) five

SOLUTION: b

PROBLEM: Elephants rise ____ inches when they inhale.\Question: Choose the right answer from options given a) two b) five c) one d) eight

SOLUTION: a

PROBLEM: Exhaust gases make ____ complete passes through the water.\Question: Choose the right answer from options given a) two b) one c) four d) ten

SOLUTION:
a