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: Rheumatic fever begins one to ____ weeks after an untreated streptococcal infection.\Question: Choose the right answer from options given a) six b) ten c) two d) zero

SOLUTION: a

PROBLEM: Hummingbirds feed every ____ to fifteen minutes from sun-up to sundown.\Question: Choose the right answer from options given a) nine b) seven c) four d) ten

SOLUTION: d

PROBLEM: Most boys are born with ____ testicles in the scrotum.\Question: Choose the right answer from options given a) two b) eight c) five d) four

SOLUTION:
a