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: Water weighs about ____ pounds per gallon.\Question: Choose the right answer from options given a) seven b) ten c) zero d) nine

SOLUTION: b

PROBLEM: Turkey also has ____ inland drainage basins.\Question: Choose the right answer from options given a) zero b) two c) eight d) nine

SOLUTION: b

PROBLEM: Elephants have ____ molars, which are replaced five times, for a total of six sets in a lifetime.\Question: Choose the right answer from options given a) five b) three c) four d) zero

SOLUTION:
c