单项选择题

For most people who have sleeping troubles, which of the following is the most usual cause

A．Their room is not cozy.
B．They are busy and occupied.
C．They have chronic disease.
D．They take a nap after lunc
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All of the Great Lakes are shared between the United States and Canada EXCEPT
A. Lake Ontario.
B. Lake Superior.
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John Milton’s ______ is the most famous epic after Beowulf.
A. Areopagitica
B. Samson Agonistes
C. Paradise Regained
D. Paradise Lost
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