Direction: In the following passage, some words have been deleted. Fill in the blanks with the help of the alternatives given. Select the most appropriate option for each blank.

A newborn baby appears to be sleeping almost all the time. But as it grows up, its __(1)__ of sleep changes. It sleeps less and less and stays awake longer, playing or crying or __(2)__. By adulthood, the pattern is well established, people sleep eight or nine hours a day. Well, not quite that long, for our sleep habits __(3)__ over the last century or so and we do not get as much sleep as we ought to. In the eighteenth and nineteenth centuries, people went to bed early, soon after it was dark. They had nothing to do in the evenings and their sleep habits were __(4)__ by the alternation of day and night, light and darkness. They woke up by __(5)__ and thus, they could get nine hours of sleep on an average.