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').

Most people require roughly seven to ____ hours of sleep a night to stay alert through the day.\Question: Choose the right answer from options given a) eight b) ten c) one d) five
a

Bacteria come in ____ basic shapes.\Question: Choose the right answer from options given a) five b) one c) three d) nine
c

Many infected persons show ____ signs of illness.\Question: Choose the right answer from options given a) two b) no c) one d) zero

b