单项选择题

Compared mathematically to smoking and driving, almost everything else seems relatively risk-free, ______ almost nothing seems worth regulation.

A．yet
B．since
C．so
D．even though
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单项选择题
Some works of literature hold one's interest to the very last page, but others serve only as a ______, to be kept handily at a bedside table.
A．reference
B．soporific
C．pleasure
D．reminder
单项选择题
The medieval church condemned man's partaking in ______ pleasures.
A．educational
B．ascetic
C．asexual
D．sensual
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