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 olive trees live to be ____ thousand years old.\Question: Choose the right answer from options given a) ten b) zero c) two d) seven

SOLUTION: c

PROBLEM: Psychiatrists say that one in ____ people are mentally ill.\Question: Choose the right answer from options given a) one b) two c) four d) nine

SOLUTION: c

PROBLEM: Cows are pregnant for ____ months and calves are usually born naturally and easily.\Question: Choose the right answer from options given a) one b) nine c) four d) three

SOLUTION:
b