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: Cleavage occurs typically in either one, two, three, four, or ____ directions.\Question: Choose the right answer from options given a) six b) three c) ten d) two

SOLUTION: a

PROBLEM: Dunes are of ____ types - linear and parabolic.\Question: Choose the right answer from options given a) three b) four c) ten d) two

SOLUTION: d

PROBLEM: Most children improve in three to ____ days.\Question: Choose the right answer from options given a) seven b) six c) four d) ten

SOLUTION:
a