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: Argentine ants are able to establish new colonies with as little as ____ worker ants and one queen.\Question: Choose the right answer from options given a) no b) two c) ten d) five

SOLUTION: c

PROBLEM: Reservoirs cover an area of the planet ____ times the size of Britain.\Question: Choose the right answer from options given a) two b) eight c) three d) six

SOLUTION: d

PROBLEM: Economists describe economic activity as having ____ levels of knowledge intensity.\Question: Choose the right answer from options given a) ten b) eight c) three d) seven

SOLUTION:
c