单项选择题

I'm sorry to have taken up too much of your ______ time.

A．worthy
B．valueless
C．valuable
D．priceless
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单项选择题
Visitors to this country have ______ the severe punishment for relatively minor offenses, such as stealing.
A．conversed with
B．commented on
C．communicated with
D．compensated for
单项选择题
The ______ from childhood to adulthood is often a difficult time for a young person.
A．transaction
B．transmission
C．transition
D．transformation
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