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: Orangutans spend up to ____ hours a day eating or foraging for food.\Question: Choose the right answer from options given a) seven b) nine c) three d) six

SOLUTION: d

PROBLEM: Most soft leaves have ____ stomates in the upper epidermis.\Question: Choose the right answer from options given a) no b) one c) zero d) five

SOLUTION:
a