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: Meteorologists rely mainly on ____ types of satellites.\Question: Choose the right answer from options given a) four b) two c) ten d) three

SOLUTION: b

PROBLEM: Heart attacks cause some tissue death within ____ minutes and brain death within eight minutes.\Question: Choose the right answer from options given a) no b) seven c) four d) six

SOLUTION:
c