单项选择题

You can’t leave your daughter home ______ because she is only six years old.

A．alone
B．single
C．lonely
D．separate
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单项选择题
As soon as the conference was over, all the participants went back to their ______ workplaces.
A．relative
B．selective
C．perspective
D．respective
单项选择题
John strongly disagreed with the arbitrary ______ made by the board of directors, so he resigned from the board.
A．permission
B．conclusion
C．discussion
D．decision
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