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: Decapod crustaceans have ____ pairs of limbs.\Question: Choose the right answer from options given a) five b) four c) six d) seven

SOLUTION: a

PROBLEM: Tropical trees can be rampant growers, and can outgrow a wiring in as little as ____ days' time.\Question: Choose the right answer from options given a) four b) eight c) six d) ten

SOLUTION: d

PROBLEM: Oxygen occurs in nature as ____ different isotopes.\Question: Choose the right answer from options given a) eight b) ten c) four d) three

SOLUTION:
d