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: 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: Traditional neon electrifies the inert gas from ____ directions.\Question: Choose the right answer from options given a) two b) nine c) one d) six

SOLUTION: a

PROBLEM: Forests cover about ____ percent of the earth's surface, half of that is tropical.\Question: Choose the right answer from options given a) ten b) zero c) seven d) nine

SOLUTION:
c