单项选择题

We must observe the local ______ of various nationalities.

A．customs
B．rules
C．habits
D．manners
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单项选择题
Do you mind ______ the radio
A．me to turn on
B．my turn on
C．me turning
D．my turning on
单项选择题
He was ______ of having asked a silly question.
A．sorry
B．guilty
C．ashamed
D．miserable
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