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: Some taxonomists classify only ____ species though.\Question: Choose the right answer from options given a) one b) six c) two d) three

SOLUTION: c

PROBLEM: Babies are breast-fed until about ____ years of age.\Question: Choose the right answer from options given a) four b) nine c) eight d) two

SOLUTION: d

PROBLEM: Caterpillars pass through five to ____ larval instars before they enter the pupal stage.\Question: Choose the right answer from options given a) one b) three c) seven d) no

SOLUTION:
c