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: Plants can uptake ____ times more nutrients, and improve soil texture at the same time.\Question: Choose the right answer from options given a) no b) two c) three d) ten

SOLUTION: d

PROBLEM: Japan is a highly urbanised country, with approximately ____ in every four people living in cities.\Question: Choose the right answer from options given a) ten b) no c) five d) three

SOLUTION: d

PROBLEM: Most ducks acquire breeding plumage in the fall, six or ____ months before other birds.\Question: Choose the right answer from options given a) ten b) nine c) seven d) one

SOLUTION:
c